Audio problem: In the contest, there is a little boy playing "When the Saints Go Marching In" on a trumpet. While this is going on, Michelle and her friends are shown backstage getting ready to go on next (you can still see the boy playing in the background). In this shot, the boy's finger movements on the trumpet do not match with the music we hear.
Continuity mistake: When Stephanie is getting ready to leave for the dance, she pats Danny's chest with her hand. In the next shot, her arm is at her side.
Michelle Rides Again (2) - S8-E24
Continuity mistake: In the scene where the twins take Michelle's Rigby doll, as they walk towards a dresser the boy with the doll holds it with both hands. Then in the next cut when the boy says "She didn't say that", you can see he is now holding the doll under his arm.
Answer: No.