Mine has been doing the same thing. I took it into the store the other day and they hadn't heard about it yet, but supposedly more ppl have been dealing with it and it's any message over 80 characters is split into two messages, and the second message usually only contains the last word. I've heard it's a problem with the 5.1 software and hopefully they will have it fixed when they release 5.2. To get around it in the meantime though, if you put 3 spaces after the last word in your text, it will prevent the message from being split into two. Hope this helps!