If you did not log out of SGS on a previous session but closed your browser window instead and then came back later and logged in again you might show up multiple times. It will probably take 24 hours for the "extra" logins to clear.

Always log out of SGS when leaving to avoid being logged in more than once. It might also cause problems with chat and IM.

To log out either click the Home tab or mouse down to the word Login... if you are logged in clicking on Login will bring you to a page with Log Out on it.