i don't know why it's happening, but if someone signs in using facebook it gets all fucked up. basically, if i were to sign in that way, the next person to come in would be signed in as me as well. same with the person after that, and so on.
if you're having problems with this, go to "control panel" at the top, click "settings", then "services". click the "remove link from facebook" button if it's there
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