Date argument with Date filter in view does not function correctly

I've got events that span a number of years - I have a past events view and a future events view:

In my future events view i've used a filter to only show events with a date 'greater than' 'now'

In the past events i'm using an argument to show the events by year - but in the current year I don't want to show events in the future.

So I have an argument that takes the year and this filters the 'from' date - this works correctly.

If I add a filter to only show events where the 'to' date is 'less than' 'now' the view then adds in the all the events in the range specified in the date filter. i.e. if the range is -3:+3 in the date filter I get all those events regardless of setting the 'to' field to 'less than' 'now'. I'm not sure if this is the reason for the problem, but whatever permutation of settings i've tried its not working correctly.

I'm using views version 6.x-2.6 for the record - If this is a views problem then i can always move this over to that queue.

Here's my view:

$view = new view;
$view->name = 'past_events';
$view->description = '';
$view->tag = '';
$view->view_php = '';
$view->base_table = 'node';
$view->is_cacheable = FALSE;
$view->api_version = 2;
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */
$handler = $view->new_display('default', 'Defaults', 'default');
$handler->override_option('fields', array(
  'title' => array(
    'label' => 'Title',
    'link_to_node' => 0,
    'exclude' => 0,
    'id' => 'title',
    'table' => 'node',
    'field' => 'title',
    'relationship' => 'none',
  ),
  'body' => array(
    'label' => 'Body',
    'exclude' => 0,
    'id' => 'body',
    'table' => 'node_revisions',
    'field' => 'body',
    'relationship' => 'none',
  ),
  'field_exhibition_date_value' => array(
    'label' => 'Date',
    'alter' => array(
      'alter_text' => 0,
      'text' => '',
      'make_link' => 0,
      'path' => '',
      'alt' => '',
      'prefix' => '',
      'suffix' => '',
      'help' => '',
      'trim' => 0,
      'max_length' => '',
      'word_boundary' => 1,
      'ellipsis' => 1,
      'html' => 0,
    ),
    'link_to_node' => 0,
    'label_type' => 'widget',
    'format' => 'default',
    'multiple' => array(
      'multiple_number' => '',
      'multiple_from' => '',
      'multiple_to' => '',
      'group' => TRUE,
    ),
    'repeat' => array(
      'show_repeat_rule' => '',
    ),
    'fromto' => array(
      'fromto' => 'both',
    ),
    'exclude' => 0,
    'id' => 'field_exhibition_date_value',
    'table' => 'node_data_field_exhibition_date',
    'field' => 'field_exhibition_date_value',
    'relationship' => 'none',
  ),
));
$handler->override_option('sorts', array(
  'field_exhibition_date_value' => array(
    'order' => 'DESC',
    'delta' => -1,
    'id' => 'field_exhibition_date_value',
    'table' => 'node_data_field_exhibition_date',
    'field' => 'field_exhibition_date_value',
    'relationship' => 'none',
    'override' => array(
      'button' => 'Override',
    ),
  ),
));
$handler->override_option('arguments', array(
  'date_argument' => array(
    'default_action' => 'empty',
    'style_plugin' => 'default_summary',
    'style_options' => array(),
    'wildcard' => 'all',
    'wildcard_substitution' => 'All',
    'title' => '',
    'breadcrumb' => '',
    'default_argument_type' => 'fixed',
    'default_argument' => '',
    'validate_type' => 'none',
    'validate_fail' => 'not found',
    'date_fields' => array(
      'node_data_field_exhibition_date.field_exhibition_date_value' => 'node_data_field_exhibition_date.field_exhibition_date_value',
    ),
    'year_range' => '-35:+3',
    'date_method' => 'OR',
    'granularity' => 'year',
    'id' => 'date_argument',
    'table' => 'node',
    'field' => 'date_argument',
    'relationship' => 'none',
    'default_options_div_prefix' => '',
    'default_argument_user' => 0,
    'default_argument_fixed' => '',
    'default_argument_php' => '',
    'validate_argument_node_type' => array(
      'artwork' => 0,
      'exhibition' => 0,
      'music' => 0,
      'page' => 0,
      'text' => 0,
    ),
    'validate_argument_node_access' => 0,
    'validate_argument_nid_type' => 'nid',
    'validate_argument_vocabulary' => array(
      '1' => 0,
      '3' => 0,
      '4' => 0,
      '5' => 0,
      '7' => 0,
      '6' => 0,
    ),
    'validate_argument_type' => 'tid',
    'user_argument_type' => '',
    'restrict_user_roles' => 0,
    'user_roles' => array(),
    'validate_argument_php' => 'field_exhibition_date',
    'validate_user_argument_type' => 'uid',
    'validate_user_roles' => array(
      '2' => 0,
      '3' => 0,
    ),
    'validate_argument_transform' => 0,
    'validate_user_restrict_roles' => 0,
  ),
));
$handler->override_option('filters', array(
  'type' => array(
    'operator' => 'in',
    'value' => array(
      'exhibition' => 'exhibition',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'type',
    'table' => 'node',
    'field' => 'type',
    'relationship' => 'none',
  ),
  'status' => array(
    'operator' => '=',
    'value' => '1',
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'id' => 'status',
    'table' => 'node',
    'field' => 'status',
    'relationship' => 'none',
  ),
  'date_filter' => array(
    'operator' => '<',
    'value' => array(
      'min' => NULL,
      'max' => NULL,
      'value' => NULL,
      'default_date' => 'now',
      'default_to_date' => '',
    ),
    'group' => '0',
    'exposed' => FALSE,
    'expose' => array(
      'operator' => FALSE,
      'label' => '',
    ),
    'date_fields' => array(
      'node_data_field_exhibition_date.field_exhibition_date_value' => 'node_data_field_exhibition_date.field_exhibition_date_value',
    ),
    'date_method' => 'OR',
    'granularity' => 'day',
    'form_type' => 'date_select',
    'default_date' => 'now',
    'default_to_date' => '',
    'year_range' => '-3:+3',
    'id' => 'date_filter',
    'table' => 'node',
    'field' => 'date_filter',
    'relationship' => 'none',
  ),
));
$handler->override_option('access', array(
  'type' => 'none',
));
$handler->override_option('cache', array(
  'type' => 'none',
));
$handler = $view->new_display('page', 'Page', 'page_1');
$handler->override_option('path', 'past_events');
$handler->override_option('menu', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => 0,
  'name' => 'navigation',
));
$handler->override_option('tab_options', array(
  'type' => 'none',
  'title' => '',
  'description' => '',
  'weight' => 0,
));