Other mistake: At the carnival, the duo is told by the carny that they get seven rings for a dollar, but the only get five.
Suggested correction: The carny never says anything about how many rings a player gets. He only tells them the way to win, by getting a ring on a bottle.
When he's leaning up against the poke he says "Here we are folks. Seven hoops for a dollar."
I stand corrected. I just rewatched the scene. He does in fact say seven for a dollar. Interestingly, it's clear he hands Chun five rings, but when the rings are shown on the bottle, SIX are shown.