You can find the problem in lcp-parameters.php line 192
if (strpos($this->params['excludeposts'], 'this') > -1){
$exclude = array_merge(
$exclude,
array('post__not_in' => array($this->lcp_get_current_post_id() ) )
);
}
if you use “this” you overwrite ‘post__not_in’ with the current post id only.
You have to change these lines.
-> PHP Array Merge