Goofs

Oscar has a stuffed gorilla named Stanley in the movie, in flashback segments of the series set before Feilx moved in, the gorilla's name was Bruce. (It's implied that it's the same stuffed gorilla, because upon seeing it Felix says, "Ah, I see Stanley's back".)

It should've been obvious to Oscar from the get-go that something was up during the poker game. His friends would never have acted like that under normal circumstances playing poker (folding to Oscar no matter what their hands' were, clapping and chanting "Oscar wins!", etc.)