Continuity mistake: When the dancer is sitting on Michael's lap, she messes up some of his hair, causing it to stick up. In the next shot, his hair has fixed itself.
Continuity mistake: The dancer is eating some M&M's on Pam's desk. In one shot, there are some M&M's on the table in front of Pam. In the next, they are missing.
Continuity mistake: When Angela is listening to Ben Franklin talk about flying his kite, her drink is near her lap, but in the next shot she's taking a sip from it.
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.