HTC Droid Eris : Notifcations Tab Disappeared When I Pull Down To Clear Read It

I've had my eris for awhile now, no problems thus far Today, 3 times now I've gotten a text (first using handcent, now chomp) and when I pull down to clear/read it in the notifcations tab, sometimes its disappeared and then when I go into the messaging app, its GONE! WTH? Is there a setting I messed with that is making it do this, or how do I fix it?

I've had to ask people to re-send their text message, that gets pretty old for both of us. I rebooted and have yet to see if that has done anything, I havent gotten a message since I did.