Old text message stuck to the top

[profroopchan]

For about a week now, I have 1 old text message stuck to the top of my recent messages list. When I delete that message, another one goes up there. Today, I have a message from a person 2 days ago stuck to the top, however all the other messages are ordered by most recent. Every time I delete that message so that it goes away from the top of the list, another one pops up out of place at the top again. Has anyone experienced this before? What can I do to try and fix it?

I have a HTC Touch Pro with Sprint. I have not changed anything on my phone recently.