Continuity mistake: As Walter and one of his employees debate shipping an incomplete children's book, Walter is facing the employee almost straight on, but the next shot shows Walter turning his head from right to left, facing the employee straight on again.
Continuity mistake: While Papa Elf is explaining to Buddy about making Santa's sleigh fly on Christmas spirit, Buddy is behind Santa's sleigh. His right hand is on the sleigh on the lower right panel, then jumps to the upper right as the scene cuts.
Answer: Yes.