I just had it removed from my account all together. My messaging is all working again, now. When it shows back up in iOS as something I can turn back on I will give it another go. I feel like the issue is that numbersync as described by AT&T is for both text messages and calling. It seems that Apple had only implemented the calling features, and AT&T's provisioning swaps both the calling and texting settings. I think when it makes a return either Apple will have implemented both the texting and calling features, or AT&T will have fixed the provisioning to not swap the text messaging.