Continuity mistake: When Caroline is cleaning the house she is trying to sell, she's in the kitchen cleaning the counter tops. The layout is her cleaning the breakfast bar counter and the sink is behind her to the left of her. When she takes a buyer through, the kitchen layout is exactly the opposite. If you look at the breakfast bar counter top, the sink is now on the right side. Also, you'll notice the "wall" to the left of the counter top now is pushed back a little - almost like they didn't align it correctly when they put it in for shooting.Ben's Mom
Continuity mistake: Lester decides to exercise his body after listening a conversation between his daughter and her friend Angela. He goes to the garage and looks for his instruments, dropping several things to the floor. We can see some of them, but a second later when he didn't even tried to pick them up, a big one has suddenly dissappeared and never comes back.
Continuity mistake: When Carolyn calls Lester and Jane out whilst honking the horn, the shot changes from her to the house several times. Each time the shot is facing the house the side mirror is flapped in and while facing her it isn't. Additionally, in the same scene when Lester comes out, his briefcase opens and his cellphone falls out toward the car out of reach, when he picks it up again it's right next to him.