Why is my signature not showing anymore on my new posts, but still shows on my older ones?

Strange, it works in this thread, but not this one here (http://www.sitcomsonline.com/boards/showthread.php?s=&threadid=71818). Notice that there isn't any edit notice in my first (testing signature) reply.

It works in first post, but as you can see it didn't work in my first reply or this one, but it show in the preview post though.

Signatures are now set to only display once per thread, it's not necessary to see the same signature over and over again in the same thread..

Thanks, TJ!