There are three vending machines (North Pole Icy Bits, Red Deer energy drinks, and Elfsburg Choco Treats) in the vestibule of the entrance to the Hall Of The Snow Globes, but Lucy looks uncertainly around at all three machines, so obviously Scott neglected to tell Lucy which machine to use. He would never have neglected to tell her this important information, given his knowledge of how vital it was that Lucy succeed.
When Scott and Jack Frost travel back to Christmas Eve twelve years earlier, the former Santa vanishes immediately after landing on the ground. In the original film, he remained a solid body long enough for Scott to search his clothing and find the card.
When Santa and Jack go back for the second time, as they are watching Scott put on the Santa suit. Scott did not put on the suit on top of his house, it was the next house after they took of in the sled.
When the characters of Neil and Laura Miller unfreeze, Laura's zipper is undone on her pants. If you watch closely, as she unfreezes, her hands move in front of her pants and when she moves them again you can clearly see her pants are unzipped and then zipped again in the next frame.
When Scott uses the recording pen to record Jack Frost, he places it into his right inside coat pocket. Moments later, when sitting down, he pulls it out from his left inside coat pocket, then puts it back. Then when Jack Frost catches his snow globe, Scott pulls the pen back out of his right inside coat pocket.
When the fire breaks out in the kitchen, Bud comes rushing over equipped with a fire extinguisher backpack, despite the fact that the fire only just started and the news shouldn't have reached him yet.
At the end of the movie, Charlie is visible behind Lucy even though he was not previously shown at the North Pole. In fact, only Santa, Sylvia, Bud, Neil, Laura, and Lucy are shown riding the sleigh when they arrive.
Santa has to perform the pass-code to operate the revolving door to the Hall of Snow Globes, whether entering or exiting it. Therefore, Jack Frost could not have exited the Hall without knowing the code.
Lucy waltzes bouncily across the room near the entrance to the Hall Of The Snow Globes, yet when she stops upon seeing Jack with Scott's Santa-globe, the snow-globe that she''s carrying is clear, with no floating particles stirred up inside it. Obviously just an imitation snow globe without any sprinkles inside it.