The amount of spaghetti that spilled on Evelyn's floor is much more than was originally on Jake's plate.
The position of the glass of beer in Charlie's hand keeps changing slightly while he is sitting in the kitchen talking with Alan about Jake.
After cleaning the floor, Evelyin drops the cleaning spray and sponge on the floor, but in a next scene, she still holds both.
Jake leaves the upstairs bathtub running causing Evelyn to be doused by a jet of clean water. In reality, the water would soak into the ceiling above her, and when it failed she would be clobbered by a load of wet sheet rock, seriously injuring or killing her.
After Charlie is finished listening to the girl who says she was raised by her Grandma (called her Nana), one of the volleyball girls is shown pretending to drink a beer by barely raising the bottle up high enough to her mouth to take a drink.
In a future episode, when the brothers find out that Evelyn wants to pay Jake's college tuition, they try to figure out what she's up to. One of the ideas they have is that she wants him to go to college so he can then go to law school. Then, once he finishes law school, he could get her a building code variance so that she can have a second story added to her house. But, in this episode, she's hit by water coming through the collapsing ceiling from an overflowing upstairs bathtub. It would seem she already has a second floor at this point.
Jake tells Alan about how he went hiking and camping with friends and how much fun he had but later in "It never rains in Hooterville" Jake cannot stand camping and keeps telling Alan he wants to go home.