Early in the film it is established that the Rose's house is on Bonner Ave, but when Mrs. Rose calls the painter, she gives him an address on Beacon.
Mrs. Rose's first name in the film's action and in the credits is Illana, but a newspaper article shown on screen near the end of the film states her first name is Jennifer.
Samantha is supposed to be the smart daughter, and is shown reading a book many times during the film, but it is the same book and she appears to be reading from the same spot in the book in all the scenes, which take place across several days. Pretty slow reader for a smart girl.