one of two reasons, it's either a reply from an anon poster, or a moderator bump.

This happens sometimes, anonymous user will come along and read an entire section and post in the threads they like. they don't see the last date and will post in that thread anyway.

Isn't it better to post in an existing thread than to start a new one anyway? information may have changed, or new information may be available that wasn't before. Otherwise, I would just let it roll off your back

A Mod, with a wild gleam in his eye; "IT'S ALIVE!"

Ok, thanks. That and since an anonymous post won't actually appear for a while, makes sense.