They are recent articles that aren't locked with a Gold lock, right? Try posting a test message on any of the recent articles in the list, and/or even try posting your own as a test. I've asked the mods if they have any insight into this happening before.
Oh. And, how do I untag myself from a thread? There are a few threads which have gone waaaaaaay off topic and I'm not interested in continuing. What do I do?