6-player game -- there are only 3 cards in the deck to start with. Is that right?
Then we had 3 challenges where the person challenged did have the card, so they placed their card face up and took one from the deck. This leaves zero cards in the deck. Have I done it wrong?
Yeah, you are supposed to shuffle that card back into the deck rather than leave it face up ... which means you could draw the same card back.