Other mistake: Ralph gives Ed the advice to try to "squeeze" his boss for a promotion, but gets fired instead. When Ed comes home, he first stops in to see Ralph but he's not home, just Alice. All he tells Alice is that he had words with his boss and got fired. No details. Ed leaves and Ralph comes home. Alice tells him Ed was fired and described in detail the whole story of him threatening his boss for the promotion. Ed never told her exactly why he was fired.
Other mistake: At the beginning when Ed tells Ralph he can't afford to buy a new TV right now, he says it couldn't come at a worse time because Captain Video is blasting off to Pluto tomorrow. Ralph gets the idea to buy a set together. When Ed comes down and turns on Captain Video for the launch to Pluto, Ralph yells at him saying they've had this set for three nights and all they watch are Ed's shows. Captain Video should have blasted off for Pluto night one, not night three.