Other mistake: When Rafe arrives at the new school, principal Dwight has his arms full of items he confiscated when the morning has not even started yet, very specific and obvious rule-breakers like a skate, 2 footballs and a basketball. So did some dudes just start playing ball and shooting hoops in front of the principal at 8 am in the middle of the street? Who are those rebels? There's no trace of rule defiance early in the movie. (00:06:30)
Other mistake: After Norm has sunk the condos being shipped to the Arctic, Mr. Greene is walking through a street and his phone rings. When he takes out his phone, the screen is completely blank instead of showing the call screen. (01:18:45)