Continuity mistake: Before Joan discovers the wire hanger, she goes through a group of blue clothes (Christopher's) and then turns to Christina's pink clothes. However, when she is yelling, we see that there are now pink clothes on both sides, with no blue in the closet. She then begins to throw the clothes off their hangers, and Christopher's clothes are back.
Continuity mistake: When Joan Crawford insists the bathroom isn't clean, she throws a rag on the floor for Christina to use and is then seen holding both rags while sprinkling Old Dutch Cleaner on the floor. In the close up of the same action, Christina has produced one of the rags from her right hand.