Maybe your roommate gave her account to someone in your alliance that is or was running a bot, and since he got busted, and he had her account which had your IP, you all got busted.

As for the server 150/151 discrepancy, that account on every server would have been suspended. Ie - if you bot on ss1 and play but don't bot on 137, 145, and 151, you'll still be suspended on all 4 servers if the email/account is the same.

As for farming off a coordinates list... been doing that since the first week of server 78 without a single day off. Pretty sure they don't check that sorta thing