Continuity mistake: During the horse and buggy ride to the church through downtown New York, when one of the girls is holding the reins by herself, you can tell there is a person under a red blanket at her feet (I guess to protect her while filming in case something goes wrong,) and only a moment later, the same blanket is black.
Continuity mistake: Amanda spits the snail into her left hand, but when she turns around it's in her right hand.
Continuity mistake: Very early in the film, a street stickball game is interrupted by the arrival of a taxicab. As the cab approaches, it is a Chevrolet. As Diane and Amanda enter the cab and it starts to drive away, it is a Ford. As it continues to drive away, it is a Chevrolet again.
Continuity mistake: When the kids swap homes early in the film and the one in the orphanage is discovering "sloppy joes" the mess on her face goes from heaps to only a little.