I also wanted to mention....I turned off my e-mail notification because I found myself not check it because I would assume it would be e-mail coming through rather than my texts since I couldn't change the tone difference between the two. I would set my e-mail to be different but it would go back to what ever I set in my sounds.
I haven't seen it do that! Did you try a factory data reset on it at the store? If you do that, just make sure you have everything backed up first...like your contacts.
is there a way I can set a Text tone for different contacts? (example: John- Brickhouse vs Jane-Play That Funky Music)