For the website, there is a live chess setting which allows you to play multiple live chess games simultaneously. You might want to check if that setting is turned on.
https://www.chess.com/settings/live
MULTIPLE GAMES STARTING AT ONCE
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How do I stop multiplegames from popping up when Im challeng? If I choose a game from list then my challenge gets accepted and pops up and I cant get back to original game? Help!!! oliged.