Revealing mistake: In this episode Dorothy and Blanche are awakened by a stench coming from the kitchen. After they go to inspect, we see that Rose is making some sort of Krispies treat. As you see her carry the plate to offer Dorothy and Blanch one, you can see that the plate is empty. And once they all start to eat them you can easily see that none of them are actually picking anything up and putting in their mouths.
Revealing mistake: When Dorothy and Blanche are in Rose's room, look at Baby. Its very obvious its just a stuffed toy pig. You can tell by the fluffy skin, the unnatural ear movement, and the covers would be moving up and down as its breathing. You can really tell its fake when Rose gets up off her bed. (01:08:45 - 01:10:25)
Revealing mistake: Blanche, Dorothy and Rose that went on the boat with the 3 guys were stranded on what appears to be a beach. However, the "beach sand" has a lot of bouncyness to it. Giving the look of foam padding of some sort with some fabric that looks like sand. The sand doesn't actually move either while they're walking on it. (00:16:11 - 00:18:40)
Revealing mistake: Throughout the entire series every time someone is cooking on the stove there's never any steam coming from the cookware. Also looking at the burners, it's an electric oven yet the burners are never orange indicating they never really "cook" food at all.