This kinda surprised me... I have an adsense account since 2004, and recently I created another account for my friend, using his name and address but my gmail email address, but that gmail email account is also somehow linked to my other email account (one that I used for adsense), maybe because the invite for the gmail account was sent to my other email account? but anyway, i've successfully created the 2nd adsense account, but now I can log into BOTH adsense account, using the 1 email account, which account I actually log into depends on the password I use. Would this be a bug with adsense? or a "feature"?