yes. i was on tech support with at&t and we basically established that the issue was entirely about migrating from iPhone. I turned off all messaging on my old iPhone (that I've been using as an iPod touch) and deleted the threads where I had group texts on both the HTC and the iPhone. This...
Here's my issue: I will text one person and when they text me back, it shows up as multiple people on the text message. It doesn't do this with everyone, but I have this issue with about half of the people I've been texting.