As Annie is going to pick up Paul, she goes to her car and finds it locked with no keys. She then goes back to the house to get the keys and when she comes back out she just walks up and opens the car door and without even using the keys to unlock it. Now I know you could say that it was because Myers got in the car, but since the whole point of having to get the keys in the first place was because the car door was locked, don't you think she would at least use them?