Continuity: When 8Ball was standing at the clocking-in machine, waiting on Zac arriving for 8.30 a.m., there was only one clocking-in card on the righthand side rack. In the next scene, when Zac came running in to clock in, there were lots of clocking-in cards now there.

Continuity: During the checkstand competition Jorge gets tangled in Vince's scanner cord and backflips onto his face. A split second shot change and he's back on his feet pushing the cord out of his way. Then finally in the next shot he his shown just coming to his feet.

Revealing: Jorge misses scanning the barcode on the tire by several inches at the end of the competition, yet rings up anyway.

Factual error: When Semi is showing the security footage of the competition, he places the VHS tape into a VCR that is sitting in the podium behind Semi. When he fast forwards and rewinds, the remote he is using is pointing at the TV and away from the VCR. At the very least, the remote needs to be aimed towards the VCR if not directly at it.

Continuity: In the baseball game, when Zack runs into Vince, the ball flies away from them as they fall on the ground. In the next shot, it is on Zack's glove.

Continuity: Dane Cook is just coming down from his "club house" up in the top of the store. Before he goes up he rolls out caution tape blocking the aisle, and when he comes down it is still there. But when he runs from the aisle back to the front of the store the tape magically disappears.

Continuity: During the scene when Zack sneaks into the cashier's lounge, his buddies are spying on him with a pirate telescope. However when Iqbal hands it to Russell to take a look, the shot is now zoomed in to Zack swiping the card in the slot. This would be impossible as the telescope is fixed to one focal point and was already fully extended for the first shot.

Factual error: The kind of CCD barcode scanners used by the cashiers in the movie have a maximum read range of just a few inches (or less). Given this limitation, it would not be possible for Vince to scan the tire from as far away as he did in the beginning of the movie.

Plot hole: When Zach first talks to Amy, he advises her not to use the excuse "I work here". But Zach was still walking over to her when she said that, so there's no way he could have known she said it.