Continuity mistake: When DJ and Stephanie are done playing with the twins and Jesse comes in, he takes the booties off their feet, thinking that they still had their hospital bracelets on. While he is still in the kitchen, you can see that the booties are on the table between the twins. These keep changing positions in between shots, even when Jesse goes in the living room leaving the twins unattended.
Continuity mistake: Jesse is bouncing a baby on his knee and humming the theme to Bonanza, but in another episode (the one where Jesse graduates), he states that he hates that song because his dentist used to hum it while he drilled his teeth, so when he hears it his teeth hurt. When he hums it in this episode his teeth don't seem to hurt.
Continuity mistake: When D.J. is explaining about vowels, the pattern on Michelle's dress keeps changing. At times, there are flowers over her right shoulder and other times, they are more towards the left. In addition to this, her hair also keeps changing. At times the end of her ponytail is curved outwards and other times, it's straight.
Other mistake: When Becky first names the twins before leaving the kitchen, Alexander has the peach booties and Nicky has the mint green. When Jesse takes them off and goes to put them back on, he switches these colors, making Alexander mint green and Nicky peach. The next morning, Jesse ends up switching them back to the original, making the baby's identities correct. Later in the episode when he does the foot print and discovers who is who, Alexander is wearing the mint green booties and Nicky was wearing the peach, which was not what the original colors were. So they either still mixed up the babies, or he "changed" the booties other times not shown in the episode.
Continuity mistake: When Jesse throws Michelle's blue suitcase on the bed when they return home, it lands with the handle facing the camera. When Michelle goes to unpack it at the end of the scene, it's now on the other side of the bed with the handle and zip facing her.
Factual error: This episode takes place right after Jesse has had his appendix surgery. If he has just had that type of surgery he wouldn't be doing anything yet. It takes several weeks to recover from this type of surgery and he would most likely be tired and be resting a lot.
Continuity mistake: When DJ is giving her presentation to the guys about letting her have her own room, she brings up a point that Stephanie and Michelle are now the same age as DJ and Stephanie were when they started sharing a room. But Stephanie was 5 and DJ was 10 when the show started and they began sharing a room. In this episode, Stephanie was about 9 and Michelle hadn't turned 5 quite yet.