Audio problem: At the end of the elf concert, when Mrs. Claus walks right out right after Santa does, we hear the sound effect of a door slam before she even closes the door. (00:13:40)
Audio problem: In all post-1998 releases, the audio from the original 1964 ending (where the elves drop boxes) is used over the visuals of the refilmed 1965 ending (where the elves drop Misfit Toys). The "swoosh" sound from the old ending (being the sound effect from when the boxes were dropped) is heard multiple times and is not in sync with anything happening in the refilmed scene.
Answer: It's a kid's show, not Game of Thrones.