Other mistake: When Michael is playing with "Harvey" the computer, it says whatever he types. When we briefly see the computer screen, the entire dialog for the scene is already typed out, in spite of it including text that hasn't been said yet and that Michael wouldn't know Harvey would say (such as "you ruined a funny joke, get out of my office").
The Office (2005)
1 other mistake in season 3 - chronological order
Starring: Steve Carell, John Krasinski, Rainn Wilson, Jenna Fischer, Leslie David Baker
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.
Michael Scott: This is an environment of welcoming, and you should just get the hell outta here.
Health Care - S1-E3
Trivia: Creed Bratton plays the voice of the Industrial Coal Mine Shaft employee that Michael talks to on the phone when he's trying to come up with some surprise for the staff. (00:12:15)
More questions & answers from The Office
Suggested correction: Michael didn't establish the contract with Hammer-mill. Rather, he locked them up as an exclusive supplier. It's unknown if they were already selling the products to Dunder Mifflin alongside Staples and Office Max.
Wrong, Josh says they cannot sell Hammer-mill products as they are exclusive to Staples so therefore they wouldn't have been able to sell there products alongside as mentioned before until Michael made them an exclusive to them solely, Dunder Mifflin. Therefore the original mistake stands true.