Continuity mistake: From the outside of the house, you can see the staircase and door are to the far left of the house. But from inside the house, you have a fireplace and the staircase to the right of the door. So you know it's not the same house they use in the show.
Family Matters (1989)
Episode list - season 9
More mistakes in Family Matters
Steve: Laura, this is a... A really special moment and... Well, I think we should celebrate it by... Getting married.
Laura: No.
Steve: Engaged?
Laura: No.
Steve: Going steady?
Laura: No.
Steve: A date?
Laura: No.
Steve: A kiss?
Laura: No.
Steve: A handshake?
Laura: No.
Steve: I'll see ya tomorrow?
Laura: Yeah.
Steve Urkel: I'll take it.
Trivia: The Family Matters set shared a basketball court with the set of E.R. Jaleel White revealed that he would play George Clooney one-on-one wearing suspenders while Clooney would be wearing scrubs.
Question: In the mistakes section it mentions that Richie's mother, Rachel, and the Winslow's younger daughter, Judy, disappeared without a trace. Was there ever any explanation?
Answer: No. Call it "Chuck Cunningham Syndrome". A character is written off the show without any explanation at all.
Answer: She disappeared because Judy and Steve's actors, Jaimee Foxworth and Jaleel White, didn't get along with each other.
Answer: It is said that as Steve Urkel became a more popular character on the show, Judy became less important to the storylines, plus either her or her parents were demanding more money, causing her to be removed from the show entirely.