I recently purchased a new Window's Phone 8 and upon setting up my phone account it automatically generated an new XBOX Live gamertag before I had the chance to enter in my current gamertag.
I spoke with a rep and they told me I had to wait 30 days and then play roulette with my gamertags and 3 separate emails. 30 day mark arrived and upon doing this a device sensed t hat I was logged in and auto generated another gamertag. I suppose I am posting this to see if anyone else has experienced this problem and if/how it was remedied. Please let me know if you found a viable solution.