left panels has stopped displaying - 2 col stacked panel page

Hi there,

I'm not sure if this is a bug or if I have done something wrong. I have built a 2 column stacked panel page. Everything was working fine - with content in the top. left and right panels. Then I added another item to the top panel, and suddenly the left panel stopped displaying. I tried removing the item (a views block) , but the left hand column did not reappear.

I also tried adding another item to the left panel, but that did not display. It's just gone.

Here is the exported code:

$page = new stdClass;
$page->disabled = FALSE; /* Edit this to true to make a default page disabled initially */
$page->api_version = 1;
$page->name = 'newsletter_index';
$page->task = 'panel_page';
$page->admin_title = 'Newsletter Index';
$page->path = 'newsletter/%week';
$page->access = FALSE;
$page->multiple = FALSE;
$page->menu = FALSE;
$page->arguments = array(
  'week' => array(
    'id' => 1,
    'identifier' => 'weeknumber',
    'name' => 'string',
    'settings' => array(),
  ),
);
$page->conf = array(
  'no_blocks' => 0,
  'css_id' => 'newsletter-contents',
  'css' => '',
);
$display = new panels_display;
$display->layout = 'twocol_stacked';
$display->layout_settings = array();
$display->panel_settings = array(
  'left' => array(
    'style' => '-1',
  ),
);
$display->cache = array();
$display->title = '';
$display->hide_title = FALSE;
$display->content = array();
$display->panels = array();
  $pane = new stdClass;
  $pane->pid = 'new-1';
  $pane->panel = 'left';
  $pane->type = 'custom';
  $pane->subtype = 'custom';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'title' => 'xxxx',
    'body' => 'Bond Markets',
    'format' => '1',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 0;
  $display->content['new-1'] = $pane;
  $display->panels['left'][0] = 'new-1';
  $pane = new stdClass;
  $pane->pid = 'new-2';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_8',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 1;
  $display->content['new-2'] = $pane;
  $display->panels['left'][1] = 'new-2';
  $pane = new stdClass;
  $pane->pid = 'new-3';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_9',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 2;
  $display->content['new-3'] = $pane;
  $display->panels['left'][2] = 'new-3';
  $pane = new stdClass;
  $pane->pid = 'new-4';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_10',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 3;
  $display->content['new-4'] = $pane;
  $display->panels['left'][3] = 'new-4';
  $pane = new stdClass;
  $pane->pid = 'new-5';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_11',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 4;
  $display->content['new-5'] = $pane;
  $display->panels['left'][4] = 'new-5';
  $pane = new stdClass;
  $pane->pid = 'new-6';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_12',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 5;
  $display->content['new-6'] = $pane;
  $display->panels['left'][5] = 'new-6';
  $pane = new stdClass;
  $pane->pid = 'new-7';
  $pane->panel = 'left';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_13',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 6;
  $display->content['new-7'] = $pane;
  $display->panels['left'][6] = 'new-7';
  $pane = new stdClass;
  $pane->pid = 'new-8';
  $pane->panel = 'right';
  $pane->type = 'custom';
  $pane->subtype = 'custom';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'title' => '',
    'body' => 'Equities',
    'format' => '1',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 0;
  $display->content['new-8'] = $pane;
  $display->panels['right'][0] = 'new-8';
  $pane = new stdClass;
  $pane->pid = 'new-9';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '10',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_1',
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 1;
  $display->content['new-9'] = $pane;
  $display->panels['right'][1] = 'new-9';
  $pane = new stdClass;
  $pane->pid = 'new-10';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_2',
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 2;
  $display->content['new-10'] = $pane;
  $display->panels['right'][2] = 'new-10';
  $pane = new stdClass;
  $pane->pid = 'new-11';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_3',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 3;
  $display->content['new-11'] = $pane;
  $display->panels['right'][3] = 'new-11';
  $pane = new stdClass;
  $pane->pid = 'new-12';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_4',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 4;
  $display->content['new-12'] = $pane;
  $display->panels['right'][4] = 'new-12';
  $pane = new stdClass;
  $pane->pid = 'new-13';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_5',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 5;
  $display->content['new-13'] = $pane;
  $display->panels['right'][5] = 'new-13';
  $pane = new stdClass;
  $pane->pid = 'new-14';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_6',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 6;
  $display->content['new-14'] = $pane;
  $display->panels['right'][6] = 'new-14';
  $pane = new stdClass;
  $pane->pid = 'new-15';
  $pane->panel = 'right';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '0',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_7',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 7;
  $display->content['new-15'] = $pane;
  $display->panels['right'][7] = 'new-15';
  $pane = new stdClass;
  $pane->pid = 'new-16';
  $pane->panel = 'top';
  $pane->type = 'custom';
  $pane->subtype = 'custom';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'title' => 'Insto Australian Financial Markets Newsletter',
    'body' => 'c',
    'format' => '1',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 0;
  $display->content['new-16'] = $pane;
  $display->panels['top'][0] = 'new-16';
  $pane = new stdClass;
  $pane->pid = 'new-17';
  $pane->panel = 'top';
  $pane->type = 'views';
  $pane->subtype = 'newsletter_cat_listings';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'nodes_per_page' => '1',
    'pager_id' => '1',
    'use_pager' => 0,
    'offset' => '0',
    'more_link' => 0,
    'feed_icons' => 0,
    'panel_args' => 1,
    'link_to_view' => 0,
    'args' => '',
    'url' => '',
    'display' => 'block_14',
    'context' => array(
      '0' => '',
    ),
    'override_title' => 0,
    'override_title_text' => '',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 1;
  $display->content['new-17'] = $pane;
  $display->panels['top'][1] = 'new-17';
  $pane = new stdClass;
  $pane->pid = 'new-18';
  $pane->panel = 'top';
  $pane->type = 'custom';
  $pane->subtype = 'custom';
  $pane->shown = TRUE;
  $pane->access = array();
  $pane->configuration = array(
    'title' => 'Contents',
    'body' => 'Week ending <<code to calc date here>>',
    'format' => '1',
  );
  $pane->cache = array();
  $pane->style = array();
  $pane->css = array();
  $pane->extras = array();
  $pane->position = 2;
  $display->content['new-18'] = $pane;
  $display->panels['top'][2] = 'new-18';
$page->conf['display'] = $display;

Can anybody point me in the right direction to get this working?

Thanks