Has anyone done something like this? Does anyone have any example code?

Here is what I have tried/noticed so far. The following code is only a slight change from the demo, but it works/fails in the following ways:

1. I can relate posts from my CPT “action”, and they will show with the edit box and meta data field.
2. I can update the regular POST fields like Title and content
3. I CAN NOT update the associated meta data field (expiration_date). When changed it reverts back to whatever the separate CPT holds.
4. Changing expiration_date to have a scope of post_meta links it to the parent instead of the child.
5. Changing scope to the name of my CPT (‘action’) results in nothing working, just blank fields not attached to anything.
6. I also notice that clicking “save” while in the parent will unfortunately publish instead (I suspect due to the presence on the child post of hidden field with post status of publish, but clearly it should only update the child status, not the parent)

 piklist('field', array(
    'type' => 'checkbox'
    ,'field' => '_' . piklist::$prefix . 'relate_post'
    ,'label' => __('Relate Posts', 'my-domain')
    ,'choices' => piklist(
      get_posts(array(
        'post_type' => 'action'
        ,'numberposts' => -1
        ,'orderby' => 'title'
        ,'order' => 'ASC'
      ))
      ,array('ID', 'post_title')
    )
    ,'relate' => array(
      'scope' => 'post'
    )
  ));

  $related = get_posts(array(
    'post_type' => 'action'
    ,'posts_per_page' => -1
    ,'post_belongs' => $post->ID
    ,'post_status' => 'publish'
    ,'suppress_filters' => false
  ));

piklist('field', array(
    'type' => 'group'
    ,'scope' => 'post'
    ,'label' => 'Related Posts'
    ,'relate' => array(
      'scope' => 'post'
    )
    ,'add_more'=> true
    ,'fields' => array(
    
    array(
    'type' => 'datepicker'
    ,'field' => 'expiration_date'
    ,'required' => true
    ,'label' => __('Expiration Date', 'my-domain')
    ,'help' => __('Choose an expiration date for this item.', 'my-domain')
    ,'options' => array(
      'dateFormat' => 'yy-mm-dd'
    )
    ,'attributes' => array(
      'size' => 17
    )
  ) 
      ,array(
        'type' => 'text'
        ,'field' => 'post_title'
        ,'label' => 'Post Title'
        ,'columns' => 12
      )
      ,array(
        'type' => 'textarea'
        ,'field' => 'post_content'
        ,'label' => 'Post Content'
        ,'columns' => 12
        ,'attributes' => array(
          'rows' => 5
        )
      )
      ,array(
        'type' => 'hidden'
        ,'field' => 'post_status'
        ,'value' => 'publish'
      )
    )
  ));

Anyone?