Other mistake: In the first episode it shows the house a mess and Danny and Joey and Jesse not wanting to clean. Then in the future the show portrays Danny as always being a neat freak, even as a child.
Continuity mistake: At the end, there is a closeup of Michelle in her playpen making a funny face and putting her arms up. It cuts to a shot of the entire family (we can still see Michelle in the play pen) and her arms are suddenly down.
Continuity mistake: When Danny says, "or all five of us will move into the garage". Stephanie laughs and in that shot from behind Danny, you can see that Danny is looking at Stephanie but in the next shot he's looking at DJ again.