Can you play Clash of Clans using the same Apple ID? Me and my brother want to play Clash of Clans with different game progress but somehow he always gets my progress when he plays it.

He got a new Apple ID and a new Game Center, but somehow the same problem is happening: we can't play the game separately - we tried and tried but it still doesn't work.

What can we do to play the game using different progress?
This game saves progress to Game Center. If you both use the same AppleID for Game Center to log in, that would explain what you are seeing.