Other mistake: When the phone pole was installed with a "butt set" to talk with, they used it upside down for a long time. Someone must have brought it to the director, because they finally corrected the problem.
Other mistake: In the opening sequence Oliver stops the tractor in front of the house by pulling a lever. This lever is not a brake but is to engage a wheel to put a belt around to operate a threshing machine.
Suggested correction: The lever is to engage and disengage the clutch, when he pulls it back that disengages and the tractor would stop.
Older tractors had a hand clutch like that.
Other mistake: A shallow tray of pancake batter is cooking on the stovetop. The coffee pot boils over and its round lid shoots into the air. Even though the lid would be extremely hot, Lisa catches it with both hands and uses it to cut four pancakes.
Other mistake: Mr. Haney is suing Oliver Douglas. While on the witness stand following a recess for lunch, Haney taps his right cheek and tells Judge Clemens, "You have some ketchup on your cheek." The Judge wipes his left cheek with a handkerchief.
The Vulgar Ring Story - S2-E28
Other mistake: Lisa thinks her ring went down the drain while she was washing dishes in the kitchen sink. Oliver disconnects the pipes under the sink and does not find the ring, but he removes a long blue scarf from the trap. It is completely dry.