Array returned for p2p_type( $connection_type)->get_adjacent_items($id); changes even when using the same post id!

[dawnbuie]

I've written a function to output the associated series for all posts on my site. I feed in the ID of the post and use the following to test for a series.

$items_in_series = p2p_type( $connection_type)->get_adjacent_items($id);

It works perfectly for all but one set of posts generated by YARPP (yet another related posts plugin). The weird thing is I'm just sending the ID of the post now - not the post object - thinking this would fix my problem. It didn't.

When I print_r($items_in_series)

the post the correctly outputs its associated series title says:

Array ( [parent] => WP_Post Object ( [ID] => 1286 [post_author] => 1 [post_date] => 2013-03-10 22:50:54 
...

 [post_parent] => 0 [guid] => http://demo5c.riotwire.com/?post_type=cartoon&p=2030 [menu_order] => 0 [post_type] => cartoon [post_mime_type] => [comment_count] => 0 [filter] => raw [p2p_id] => 81 [p2p_from] => 2030 [p2p_to] => 1286 [p2p_type] => cartoon_to_series ) ) 

whereas the post that won't return its associate series title says:

Array ( [0] => from [1] => P2P_Item_Post Object ( [item:protected] => WP_Post Object ( [ID] => 1532 [post_author] => 8 [post_date] => 

...

[post_parent] => 0 [guid] => http://demo5c.riotwire.com/?post_type=cartoon&p=1532 [menu_order] => 0 [post_type] => cartoon [post_mime_type] => [comment_count] => 0 [filter] => raw [score] => 14.9 ) ) ) 

Somehow I don't think I'm passing the post ID properly - that the Post object is being sent instead.

[dawnbuie]

So I now know I am sending the correct Post ID to my function. I then recreate the right kind of post_object using:

$post_object = get_post( $id, 'OBJECT');

then I see if there is a series post associated with this cartoon post:

$items_in_series = p2p_type( $connection_type)->get_adjacent_items($post_object);

If I print_r($items_in_series) at this point, the YARPP generated cartoon posts don't output anything while the rest of the cartoon posts do output the info for the associated series post.

If I'm using the exact same post object should I get the exact same result?? Especially when the same cartoon post is output by both systems, but only the YARPP generated one doesn't return a series.

Am I missing something obvious?

thank you.