hook_menu() - 1 set of items get's duplicated

Hi everyone!

I'm working on a small module for my company intranet purposes, and one of the functions I need is an additional Menu Tab on specific node type right along with the View and Edit tabs. That particular tab (we'll call it Follow Up) should also have 2 submenu tabs available as well. Should look like this (assuming Follow Up tab is active):

| View | Edit | >Follow Up |
| >Automatic Campaigns | Letters|

But here is what I get:

| View | Edit | >Follow Up |
| >Automatic Campaigns | Letters|
| >Automatic Campaigns | Letters|

The buttons work correctly and everything is fine beside the fact that they are duplicated.
Here is my hook_menu() code:

function followup_menu($may_cache) {	
	$items = array();

	if ($may_cache) {
	
		$items[] = array(
			'path' => 'admin/settings/followup',
			'title' => t('Follow up settings'),
			'description' => t('Select content type for the Follow Up.'),
			'callback' => 'drupal_get_form',
			'callback arguments' => array('followup_admin_settings'),
			'access' => user_access('administer site configuration')
		);
	
	}else
	{
	$types_to_followup = variable_get('followup_nodetypes', array('leads'));
	if (!$may_cache) {
		if(in_array($node->type, $types_to_followup)){

		if (arg(0) == 'node' && is_numeric(arg(1))) {
      		$node = node_load(arg(1));
	      if ($node->type == 'leads') { 
		        
				$items[] = array('path' => 'node/'. arg(1) .'/followup',
	    	      'title' => t('Follow Up'),
	        	  'callback' => 'followup_tab_page1',
	    	      'callback arguments' => arg(1),
	        	  'access' => node_access('update', $node),
		          'type' => MENU_LOCAL_TASK,
		        );
				
				$items[] = array('path' => 'node/'. arg(1) .'/followup/campaign',
	    	      'title' => t('Automatic Campaigns'),
	        	  //'callback' => 'followup_tab_page1',
	    	      //'callback arguments' => arg(1),
	        	  'access' => node_access('update', $node),
		          'type' => MENU_DEFAULT_LOCAL_TASK,
		        );
				
				$items[] = array('path' => 'node/'. arg(1) .'/followup/letters',
	    	      'title' => t('Letters'),
	        	  'callback' => 'followup_tab_page2',
	    	      'callback arguments' => arg(1),
	        	  'access' => node_access('update', $node),
		          'type' => MENU_LOCAL_TASK,
		        );
		 	}
		 }
	}
	}
	}
	return $items;
}

The first condition is for the Admin Settings and the second one for the node.

I appreciate any help!
Thanks!