Hi, this is Sgt bertrund here (not what it says).
I recently bought a new Xbox and when trying to recover my account from my old, broken Xbox 360 with one problem - the email account associated with my actual account (Sgt bertrund) is also associated with this one which I have no idea is, who owns it etc.
This may not be fully Micro$oft's fault - if it catch my mind this happened after I tried to create a Bungie.net account via my Xbox Live account failed miserably.
Thanks for your help!