When you sign into ggFTW, your login session will expire after certain time and you'll be logged out automatically. To fix this, you need to check "Remember me" next to the sign in forms (even if you use a browser based password reminder).
The reason it signs you in automatically, is because you have Facebook linked with ggFTW. You can either revoke that access in your Facebook settings, or make it stop by staying signed on all the time with the step I mentioned above.
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