Audio problem: When Andy jumps on his Mums bed, on the morning of his birthday, he shouts "Wake up, Mummy, Wake up." but his mouth doesn't move. (00:08:50)
Audio problem: Towards the end just before Chucky is shot "dead", there's one point when he says something but his mouth isn't moving. Look at the last sentence very carefully to see.
Chosen answer: This isn't a mistake. John made the voodoo doll himself. When Chucky said he was "prepared" for it, he meant that he was prepared to do whatever it takes to get information from John about his being wounded. Even killing him as we see.