I have a Verizon Bold and it's doing the same thing. It randomly sends previous texts over and over... I've taken the battery out of my phone and it's still sending texts.
I started having the same problem Sat night...not only are others receiving multiple txt from me but I am also them...I have owned this phone since August&have never had these issues...at first I thought it was a communication problem with Iphone users until tonight when it repeated with another 9900 Bold....I use Bluegrass Cellular and that was my second thought as to were the problem occurred until reading your thread...its very annoying!! If anyone can find a solution it will be here in the Crackberry Community....