Audio problem: When the Queen is speaking to the Troll King for a second time in the mirror, she wraps up discussion with him and in the next shot she walks over to her mirror and says, "Mirror, talk to me, why haven't you found Windell yet?" The Queen's mouth moves ahead of the actual voice.
Audio problem: During the shepherdess competition, when Sally says that Virginia doesn't have a dog, there is a shot of Sally while she is still saying the words, but her lips aren't moving. She just makes a small smile.
Answer: Because if Wendell and the switched dog somehow came in contact with each other then they would switch back. She does not want to risk this happening.
Scrappy