iMessage issue
So my friend Mitch just got iOS 5 and sent me an iMessage for the first time. He sent if from his iPhone, yet came through on my phone from his email address, not his phone number like normal. I now have two conversations for him in my messages - one is iMessages and the other is text. Why are try not appearing in the same conversation? Both his number and email are under the same contact in my contacts.
It's highly annoying as on his end, I appear as one conversation - both texts from before and now iMessages. Why isn't te same thing happening on my end?
iPhone 4, iOS 5