Gaffes

In the scene where Lee and Ann are at Lee's house and Lee reads Ann a passage from a book, Ann throws away the book irritated after a few sentences. In the next shot, the floor where the book should have ended up is empty.

Ann's fingernails after she gets them done.

When Deborah Harry is watching 'Mildred Pierce', we hear Ann Blyth's famous spiteful dialog on the stairway right before Joan Crawford slaps her. When we see the TV, we see a later scene, with Blyth in her nightclub dressing room.

When Ann the neighbor is talking about the conjoined twins, she says one was a girl and the other was a boy. Conjoined twins are formed from the same egg, so is generally understood that both twins should be of the same gender. However if the egg is fertilized by a male sperm but during cell division only the X chromosome is duplicated it could result in monozygotic twins of different sexes . This results in one normal male (XY) and one female with Turner syndrome.

When Ann and Lee are in the restaurant and Ann asks Lee to ask the waiter to put her food in a doggy bag, she stands up and the microphone in her back is seen

Ann says that her birthday is in December. Later, she says she is an Aquarius. The astrological signs associated with December are Sagittarius and Capricorn. An Aquarius would have been born in late January or early February.