Messaging problem

[ElAguila]

I started using the text messaging on mogul and for a couple of weeks now everything has been fine. Now out of the blue I have started having a very annoying issue. When I get a text message I get a notification. I tap on it and read the message. The notification beep continues to notify me about every minute. I opened the messages and selected all and told it to mark as read. The notification beeps still continue. Resetting didn't help. The only thing that stops the notification beep is if I delete the message. Any ideas why this is happening and how to stop it?

I forgot to mention that I checked the sounds an notifications to make that repeat wasn't checked for the text messages and it is not.