Other mistake: In the opening scene showing the outside of the house, the garage and driveway are on the left side of the house. In "End of the Curse," the girls raise minks in the garage, which is accessed from the back corner of the kitchen, thus the garage is actually on the opposite side of the house. Furthermore there are four large bedrooms and at least one large bathroom down the hallway. The hallway shoots off the living room at an angle. There is not enough room to fit all those rooms between the supposed garage and the kitchen and the lanai; all of the rooms would overlap one another. Lastly, the lanai seems to be surrounded on three sides by the house (as is typical of a lanai) but the hallway leading to the lanai, and the way the girls enter from the left, would put it on the very front corner, and surrounded by nothing.
Other mistake: In the episode where Blanche and Rose became big sisters to two girls there is a mistake the girls make the first time they are in the house. Blanche says she is going to show them make up tricks in her bed room and the two girls go to her bedroom without asking where it is or which one it was while Blanche was still talking.