BB Curve :: 8530 - Getting Multiple Copies Of Text Within Few Minutes

I have been getting multiple repeat texts on my Blackberry Curve 8530. For instance, I will get as many as five or six copies of the exact same message within a few minutes of each other. The people who are texting me are only sending the message once, so I assumed the problem was on my end. I reset the phone about three times per week, but the problem does not improve or get worse. I have even pulled the battery after it happens, but it continues after it reboots.