I’m trying to create a metabox group with fields :

member_image : upload photo
position : member position
name : member name
interest1 : interest 1
interest1 : interest 2
interest1 : interest 3

and came up with the following Piklist field :

piklist('field', array(
	'type' => 'group',
	'field' => 'members_list',
	'label' => 'Members List',
	'columns' => 12,
	'add_more' => true,
	'fields' => array(
			
			array(
			'type' => 'file',
			'field' => 'member_image',
			'label' => 'Foto Upload',
			'columns' => 12
			),

			array(
			'type' => 'group',
			'field' => 'details',
			'attributes' => array(
				'class' => 'details'
				),
			'fields' => array(

				array(
					'type' => 'text',
					'field' => 'name',
					'label' => 'Full Name',
					'columns' => 12
					),

					array(
					'type' => 'select',
					'field' => 'position',
					'value' => 'member',
					'label' => 'Position',
					'columns' => 3,
					'description' => 'Member Position',
					'choices' => array(
						'head' => 'Head',
						'member' => 'Member'
						)
					), 

					array(
						'type' => 'text',
						'field' => 'interest1',
						'label' => 'Interest 1',
						'columns' => 12
					), 

array(
						'type' => 'text',
						'field' => 'interest2',
						'label' => 'Interest 2',
						'columns' => 12
					), 

array(
						'type' => 'text',
						'field' => 'interest3',
						'label' => 'Interest 3',
						'columns' => 12
					)

				)
			)
	)
));

The field displays fine, and I’m able to upload and insert data, as can be seen in the attachment. However, the resulting array structure from

`$members_list = get_post_meta($post->ID, ‘members_list’, true)’

returns an incorrect structure for the field members_list (array of the details group is fine)

Array ( 
	[member_image] => Array 
		( 
			[0] => Array
			( 
				[0] => 16 
			) 
		
			[1] => Array 
			( 
				[0] => undefined 
				[1] => 23
			) 

                        [2] => Array 
			( 
				[0] => undefined 
				[1] => 30 
			) 
	) 

Other than index 0, index 0 of the subsequent indices is undefined. If the following template part is used to loop through the result

piklist(get_template_directory() . 'template-show-member', array('data' => $members_list, 'loop' => 'data'));

a quick check of index 0 of the $data['member_image'] can be done in the template-show-member to check whether the image ID is stored in the 0th or the 1st index

$pic = $data['member_image'][0] != 'undefined' ? $data['member_image'][0] : $data['member_image'][1];
echo "<img src='" . wp_get_attachment_url($pic) . "' />";

Although I’m able to post the correct images using the above fix, I don’t think it’s the way it’s meant to behave. Help?

Cheers,
Agi