Other mistake: When Buddy's brother is reading Santa's list he reads the newscaster's wish he looks and mutters something about letters meaning they were in alphabetical order. However when he is saying random names he does not turn the page and the names are not in alphabetical order. (01:23:00)
Suggested correction: After he says each name, it cuts to that person and their reaction. Most of which was done without going back to Michael. Therefore, we can't say he didn't turn the pages.
Other mistake: Considering how long the Prime Minister's car is parked outside in front of the only road into the school, where there is to be the school Christmas concert, it's surprising how many cars are still trying to find a parking space. Also, you can see that no cars are driving when Natalie gets out of the Prime Minister's car.