Other mistake: Blanche asks Daisy to go to Rose's room to get the things she set out for the rummage sale. Daisy goes into the first room on the right and gets the items, including Rose's teddy bear. Blanche gives it to her for helping out. Rose comes home, goes to her room and comes back asking where her bear is. Problem is, Rose's room is at the end of the hall on the left.
Factual error: In the season 3 opener, Sophia befriends an elderly gentleman and spends much of the episode on a boardwalk in Miami Beach. The set design, however, replicates nothing even close to Miami Beach. Instead of chrome and neon Art Deco it looks like a northern fishing village complete with netting and buoys.