Other mistake: At the beginning of the episode where the twins and Joey are doing handprints in plaster, Jesse walks to the kitchen to put the plasters away, comes back to the twins and only wipes one of the twins' hands. The shot changes to Joey for a short couple of seconds then back to Jesse, who is finishing wiping the same twin's hands, now saying that both boys hands are "de-icka-fied." Also, before he started wiping the one twin's hands, the kid lifted his hands up in view and they were already clean.
Other mistake: When Danny enters the bathroom, there is a window in the wall next to the door with daylight coming through. Yet according to the house plan, the stairs to the attic are supposed to be located behind this wall- the door to them is even seen in the background as the pizza guy passes them in the hallway.