Continuity mistake: When Eric is talking to his tutor in the hallway after recieving an A- on a test, there is a poster in the background for Sex Ed. This changes though, from saying "Sex, Ed?" to "Sex Ed" throughout the scene.
Other mistake: When Cory and Shawn are auditioning for "Guys" and they're talking about the first person they pick, Cory says,"He's shorter than me and..." but after they pick both guys and he's talking to them, you can see that Cory is the shorter one.
Continuity mistake: At the end of this episode, you see Griff standing with Joey and Frankie. He's wearing a jacket over a pink button down shirt that has a red collar and red accents. He sees a girl, and the camera moves to Joey who stands up on the bench and screams at the girl, then when the camera goes back to Grif, he's wearing a jacket over a plain old faded red shirt. I wonder what happened to the other shirt.
Pairing Off - S2-E2
Continuity mistake: At the end of this episode when Eric & Cory are talking about Cory's date, Eric walks from his desk to the bed and we see the bedroom door is open, but when he walks to his desk from the bed the door is then suddenly closed.
Continuity mistake: Cory and Harley are out in the hallway after the bell rings, and Cory says he should be in history class, then when they are in Mr. Feeny's office, the bell rings again and Cory says his next class is American history.
Revealing mistake: When Cory and Shawn are holding band auditions, if you watch the guy that is shredding on guitar, you can see that although he is moving his fingers all over the fret board, his picking hand remains motionless, showing that he isn't actually playing and the sound was added in post production.
The Thrilla' in Phila' - S2-E21
Audio problem: When Joey is saying "Frankie, tag me," his mouth movement is not synchronized with the dialogue.
Continuity mistake: At the end of the episode, when Alan is about to eat the cookie and Amy shows him what she is wearing, he drops the cookie onto his stomach. Later when Amy whispers something in his ear, Alan gets up but the cookie is gone.
Answer: Topanga's middle name is never specified. Considering her sister's name is Nebula Stop-the-war Lawrence, Topanga's is probably something equally unusual.