I dont completely understand the question you have but u need to use your gamertag email and password for your bungie.net account to link it to your gamertag or else it will give u a random gamertag i had the same problem. you must go to dashboard then you must go to your avatar picture box and press A on it right beside where it shows your messages,profile,customize avatar ETC... you go right a box to account management and press manage account, thengo right 2 boxes to your information box then press windows live ID and it will show you your email adress im not sure about password though i hope this htread helped bye.