When I first started the game, I was playing on a guest account. When I switched phones I had to restart all over again, but this time I connected to FaceBook. After a little while, I had the accounts switched using the support key so that I wouldn’t lose my progress. I re-visited the game after a while and when I went to log in it said there was an error and it logged me out of the game. When I tried logging back in the support key for my game was different and the game had switched back. If it helps I know the support key for both games.