Character mistake: When Jesse and Becky are in the living room with Nicky and Alex they confuse the twins when Becky tells Jesse that he can take a break and try to get Alex to use the potty because he is doing the potty dance but the kid doing the dance and the one Jesse takes upstairs is actually Nicky. This is noticeable since Alex's hair is slightly lighter that Nicky's and his cheeks aren't as chubby as Nicky's.
Add timeNicky and alex
Revealing mistake: In the scene where Denise, Derek and Michelle are throwing the frisbee, when Derek catches the frisbee, he quickly looks up at the top of the fence and his arm is way too far up to have the frisbee get to Michelle. It is very interesting that the frisbee just happens to land on top of the fence.