Other mistake: Dorothy said she's never had a mink, but her mink stole was stolen in the Break-In episode. It was also in the pilot episode when Blanch asked Dorthy if she could borrow her mink stole.
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: A major plot point is Blanche having hurt her back in her gym class, and it is established that she is having a hard time moving. Indeed when Dorothy rushes to find Rose after hearing her scream, Blanche gets up to follow her but due to her injury she moves quite slowly. However, when Dorothy reaches the door, Blanche is right behind her, even though Dorothy did not help her and Blanche cannot move as fast as Dorothy.
Other mistake: Notice when Dorothy gets up to talk to the doctor. She's barefoot.
And Then There Was One - S2-E16
Other mistake: When the father arrives to pick up baby Emily he states his wife was having triplets the night before. Yet baby Emily in the stroller is under 6 months old. How is her mom having triplets already?
Whose Face is This, Anyway? - S2-E20
Other mistake: In Season 2 Episode 8: Vacation, Dorothy let it slip that Rose had a nose job and never mentioned her own plastic surgery. However, here Rose says that she hates plastic surgery and Dorothy admits that she got her eyes done. (00:14:35 - 00:15:04)
Answer: Ice makers were a new invention, advertisement purposes.