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If someone else has connected to their FB on your iOS device through either the FB app or safari, it's possible it's loading into the wrong profile if it's loading you at level 1, as logging out of Facebook normally only stops the game from syncing but shouldn't be bringing you back to level 1. Have a read of the moderator answer in the following link as I have feeling it's connected: https://care.king.com/en/candy-crush-saga/candy-crush-reset-my-level-to-1-and-wont-connect-to-the-right-facebook