The bedroom door doorknob - which had broken - was back together when the fathers first came to the bedroom.
The bathtub fills completely up with water in under 15 seconds.
Oliver Jr. goes from being soaked after falling into the bathtub, to being completely dry within seconds.
Ollie Jr. falls in the bath and as he fumbles around he turns the shower on, but apart from a close up of water coming from the shower head, there's no sign of it falling into the bath.
The moves in the checkers games don't make any sense.
When the "kid" Stanley enters the bedroom and shuts the door on "kid" Oliver the wall moves, indicating it's just a prop wall.