Continuity mistake: In this episode Michael can't ride a bike. But in episode 3-10, Michael was seen riding a bike with no problems.
Continuity mistake: When Gabe and Erin are talking in the bathroom, Creed comes out of the stall and closes the stall door behind him, and it stays in that position. The next time we see the door, it's wide open.
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.