Continuity mistake: Bradley Cooper has dried blood running down his face just after he sends the meals out to the star diners. Then in the next shot he rubs his sore eye - all the blood is cleaned up and it's a tiny smudge.
Character mistake: When writing in his ledger trying to reach 1 million oysters shucked, Adam's numbers do not add up. After 998,246 the next entry is 996,691 followed by 1 million. Did he mysteriously un-shuck 1,555 oysters?