Other mistake: While Snow White is singing, "I'm Wishing," we see the Prince climb onto the wall, and there's a large white feather on the right side of his beret. In the shot looking down into the well, when we see the Prince's reflection appear beside Snow's reflection, the problem is that the feather on the Prince's beret is not backwards in the reflection (it should be on the opposite side). In the next shot, the feather returns to its proper place on the Prince's beret, at his right.
Other mistake: When the Dwarfs first leave the mine entrance, the first few animation cells seem to have been omitted, so that at first the entrance is empty and then the Dwarfs appear out of thin air.
Answer: Probably because she is doing everything in secret. Servants have a tendency to talk to others.
raywest ★