Hey guys, have a little problem here with an add-more field that has me scratching my head.

I have an add-more field that serializes it’s data. It works normally when I add values to it. When I remove a value, it does not display some of the values on the edit page, even though they exist in the database. When I check the serialized data in the database, I see the correct field data, but I notice that the array keys have gaps, which I presume is confusing the field renderer?

Here is my field code:

piklist( 'field', array(
	'type'			=> 'group',
	'label' 		=> false,
	'description'	=> $description,
	'field' 		=> 'staff_departments',
	'scope' 		=> 'post_meta',
	'serialize'		=> true,
	'add_more' 		=> true,
	'fields' 		=> array(
		array(
			'type' 		=> 'select',
			'field' 	=> 'term_id',
			'value' 	=> '',
			'label' 	=> 'Department',
			'choices' 	=> array( '' => '' ) + $options,
		),
		array(
			'type'		=> 'text',
			'field' 	=> 'sort',
			'label'		=> 'Sort',
			'value'		=> '',
		),
		array(
			'type' 		=> 'group',
			'field' 	=> 'roles',
			'add_more' 	=> true,
			'fields'	=> array(
				array(
					'type' 			=> 'text',
					'field' 		=> 'role',
					'label' 		=> false,
					'value'			=> '',
				),
		) )
	)
) );

Assuming there are four values, and I remove the third one, after saving this is what I see in the database (note the gap in array keys):

Array
(
  [0] => Array
    (
      [term_id] => 21
      [sort] => 
      [roles] => Array
        (
          [0] => Array
            (
              [role] => 
            )

        )
    )
  [1] => Array
    (
      [term_id] => 23
      [sort] => 
      [roles] => Array
        (
          [0] => Array
            (
              [role] => 
            )
        )
    )
  [3] => Array
    (
      [term_id] => 5
      [sort] => 
      [roles] => Array
        (
          [0] => Array
            (
              [role] => 
            )
        )
    )
)

Any ideas what might be causing this weirdness?