I seen another person was having this same issue but I have yet to see anyone posting a fix or others acknowledging the issue we are having.
With the GB update now when I text someone once I hit send the message box goes blank and if I back out to the main SMS screen it shows the message as sent.
Once the person replies to me I get a new SMS with their reply in it, the phone is no longer grouping or threading the messages. Each time I reply/send and someone replies back it stays as a separate message.
I have conversations going with multiple people and all of their messages are all separate from my replies to them it has been quite annoying and I can't seem to find a way to fix it.
My Atrix has been stock since I got it, it is not rooted or anything, just the newest GB update and that's it.
that's bad news... i'm somewhat convinced it has something to do with the contact application. when I tested with a certain contact in my list, it would do it every time. then when I deleted that contact and added him again it seems to take care of the problem. every test since then with that contact has been good.
It is spotty at best in trying to nail it down to one contact.
I have had it done with several contacts since the GB update and it may or may not do it with that contact again. I have had it stop doing it in the middle of a conversation with a contact that it was doing it with. I did notice that I had sent that person an MMS when it stopped but it has done it with that contact since during normal SMS contact back and forth. Other contacts on the phone I have sent MMS to and it still did it with them.
I think I may be the only one with this problem because I haven't heard of it popping up or anyone looking for a resolution to it.
Not sure where to turn for help if it is just an isolated incident I doubt I would be able to get any kind of a replacement phone or help from ATT/Moto on the issue.
Also wondering if a root/mod would take care of the issue?
It does sound like your problem is more severe than mine, but I am still having it as well... It is very annoying. I can't really figure out what may trigger it. I have not sent an mms since the update.
You don't happen to use touchdown do you?
I think I've solved it. I got a couple of texts from someone who seems to always generate 2 threads / per message. I looked at their contact and noticed that I had entered their mobile number, and the same number had been merged to the contact via Facebook. I deleted the entry I had entered and texted back and forth a few times and everything stayed in the same thread - like it's supposed to!
Glad that worked for you but I refuse to add my Facebook contacts on my phone so the only contacts I get are from my Google account directly and I never had this issue on FroYo or my Samsung Epic when I was with Sprint. It all started with the update to Gingerbread.