Strange issue with HANDCENT

[DJTURNz]

I've had an annoying issue with HANDCENT. I'm not sure if I have a setting wrong or what.

Sometimes, whenever I get a new message, (which appears in my notification bar on top) I'll get the pop up of an old message. Once I clear it, I can open the new message from the Notification bar. This annoys me. Do I have something set wtrong?

So far, the popup has always been from someone other than who I got a new message from.