Corrected entry: In many places throughout the movie, people's lips don't match what they're saying.
Corrected entry: At the end of the food fight the two girls are looking up at Miss Inch and they have cake on their faces. You can see that the one in the pink dress is Haley Mills's double.
Corrected entry: When the girls first switch places, Susan tells her mom that she had wanted to talk to her about a boy she had met at camp. Her mother doesn't seem at all surprised. She should be surprised, because it was an all-girls camp, and she didn't know about the dance.
Corrected entry: In the cabin when the tomboy comes up with the idea to swap places, she has a lollipop in her hand. She gets up, stands on the bed, gets off the bed, it cuts, and she turns around - the lolly pop has disappeared.
Corrected entry: In the scene where Sharon cuts Susan's dress we see her using scissors but where did they come from?
Corrected entry: At the beginning of the film when Miss Inch is sorting the girls alphabetically, there are all these people holding signs with letters like "A-K" and "P-s" etc. One girl comes up to her and Miss Inch says "No dear, you are an 'O,' over there with the 'P to S's'" correct me if my alphabet is wrong, but doesn't O fall before P?
Corrected entry: Both of the girls parents are American, so why would the twins have British accents?
Corrected entry: When Susan cuts Sharon's hair, she cuts it identical to hers. I doubt a thirteen year old girl could cut hair like that, it looks too professional.
Corrected entry: When the twins are singing, "Let's Get Together", Susan is playing the guitar, but her right hand isn't even touching the strings to play any chords. Also, Verbena takes over on the piano for Sharon, and there is about three seconds during the switch where no one is playing the piano, and yet, the music continues.
Corrected entry: When all the girls are marching to the isolation cabin they are all in their camp uniforms. However when the girls are being called from their activities to march, some of them were swimming in their bathing suits and had no time to change clothes.