i believe I'm having the same issue. i will assume you are talking about the iPhone because thats where I'm having trouble. after a bit of playing with the problem with my friend i realized that when he sends me a txt to my email it comes from his phone number but when he sends a message to my phone number it comes from his email. keep in mind that i am using a at&t 3gs and he is using a verizon iPhone 4. both are up to date.