Have a buddy who every time he would switch from his MBP and his iPhone it would show up in 1 of 2 windows on my device (so I'd have two open windows with his name on them).....I put him through the "how to make sure iMessage is integrated with your Mac and your iPhone/iPad" but now his messages are showing up from his email address and not his phone number. How do I fix this? Separately, my daughter is about to get a new iPod Touch. Until now, she has been on my wife's iTunes account. If she is going to use iMessage (my wife currently uses it) will she be able to do that under my wife's account or will she have to get her own Apple ID?