So I am playing a game and using a costume deck of 80 cards and during the process of playing the game (this has happened 3 times now) some one will end up with the same cards, and each of the cards is different, and there are no two of the same cards. Is this a glitch, is it because two people trying to draw cards at the same time, I don't know. When I recall all the cards there is no duplicates. Otherwise I would have fixed it by now. Please help.