Working My Way Back to You - S2-E1
Continuity mistake: At the beginning of the episode, Mrs. Tanner scolds her son Brian for dumping all of the clothes from the clothes basket. When she first scolds him the basket is white; it cuts again to her, and now the basket is brown and a different shape, too.
Hit Me With Your Best Shot - S2-E21
Continuity mistake: Lynn pours milk on her cereal and she starts to put it down. The shot changes and she starts to pour the milk again.
Hit Me With Your Best Shot - S2-E21
Continuity mistake: After ALF breaks the board, Brain puts one piece in front of him. When Willie walks in it has moved to the middle of the table.
Working My Way Back to You - S2-E1
Continuity mistake: When Kate tells ALF that he's won she is not holding anything. The shot changes and she is now holding an orange.
Some Enchanted Evening - S2-E6
Continuity mistake: After Willie takes Alf into the kitchen to talk to him about someone at the Halloween party might realise that he's an alien, notice the zipper on the front of Alf. Out of nowhere, during one cut, a piece of black tape appears at the top of the zipper going across the top of Alf's chest that wasn't there before, then disappears in the next cut.
Answer: Mr Tanner actually asks Alf, "Why are you carrying our towels through the den?" The streaming subtitles are wrong when it substitutes "damp" for "den" twice. It's possible the error originated from the VHS or DVD, which occurs often.
Super Grover ★
Yes, I was re-watching episodes, and I heard "den" the next time. Thank you for answering, though.