Character mistake: Meredith admits during the ethics seminar that she has been sleeping with Bruce, the HammerMill rep, for discounts on paper/paper supplies for the company, as well as Outback steak coupons, for 6 years. But, Dunder Mifflin did not begin selling Hammer Mill products until 3-2 "The Convention" when Michael got the contract.
Continuity mistake: In one episode Angela says she hasn't talked to her sister in years over an argument that she doesn't remember. When she's engaged to Andy and they're touring Dwight's farm he mentions she has multiple sisters. In the finale she only has one sister and apparently they are incredibly close.
Continuity mistake: When we first see what Toby's daughter looks like it's in a photograph on his desk that Michael points out in 1-6 "Hot Girl". The girl in the photo has dark brown/black hair. The next time we see his daughter is in this episode, and she has bright blond hair. A completely different child actor was used. (00:07:35)