Other mistake: JJ says that everybody else in the office just has to look at their watch when the boss asks them the time but he has to go outside down the block because he can't afford a watch. Throughout the whole scene, you can see a wristwatch on his right wrist. He even raises his arm where his sleeve moves to his elbow to show it. It looks like a pretty expensive watch too.
Continuity mistake: In this episode, James recalls he and Florida, when first getting married, couldn't afford to start having children until James got a job, then his politician friend got him a job at the stockyard, and then had JJ. This whole story is in total contrast with an earlier episode in the series, in which James admitted the reason he married Florida is because she was already pregnant.