There is a way to remove the game from your playlist, but beware if you do this you will loose all your gamerscore with the games, just recover your account (IMG:
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The Kiosks have a different OS then the one or your Xbox 360, ur are only able to download themes from the Kiosks but not able to sign in with your profile.
When you press the Guide button it says something like that the Xbox Guide is not supported at this Kiosk.