When Jesse and Samantha come in from playing tennis, she shuts the door. When the door is next visible, it stands wide open even though no one touched it.
They couldn't go to Disneyland because of fog but there was no fog outside.
After Michelle takes the 5 dollar bill from Jesse, she walks away to a door. When the camera view changes to show her walking away, a person can be seen walking out of the shot in the doorway Michelle is walking to.
The family could've just driven to Disneyland if they couldn't fly there due to fog since San Francisco isn't that far from Los Angeles and Orange County.
When Jesse hands Michelle the cash, he tells her it's five bucks. However, there are multiple bills and one of them is clearly a five.