Continuity mistake: Watch Michelle's feet when she is jumping on the bed. At first she has two socks on, then when jumps off the bed, she has only her right sock on. Then, after Aaron says he should be president of their club, Michelle has both her socks. And when the club decides to pick the one who gets the Mighty Mutant Super Fortress as president, Michelle only has her right sock on.
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.
Continuity mistake: When Kimmy comes in the kitchen and sits next to DJ, there is a fork beside her plate, on the right side. In the next shot, the fork is gone. Later, when Kimmy and DJ hug, the fork is on the left side. When Stephanie reads about the baseball game an Kimmy stands up to leave, the fork is on the right side again.