Comments form action points to different node
I think I've patched the problem clearing the cache just before the comment form render:

    &lt;?php print render($page['content']); ?&gt;
    &lt;?php cache_clear_all('*', 'cache', TRUE); ?&gt;
    &lt;?php print render($content['comments']); ?&gt;


As I said, seems there is a variable cache problem, and it seems to be on the Ctools module. This is only a patch until the fix comes.

Hope it will be useful.