Other mistake: After the turkeys start attacking in "The Running of the Turkeys", Mr. Fishoder and his brother start running. In that clip a Turkey pops out the side of a guy's head. Look in the mid lower right side. Looks like a design error. Pretty big error, no slow down needed to see it. (00:05:20)
Used Karma - S1-E3
Continuity mistake: At the end of the show as Bertram scares the kids, he sits down to watch his movie. In the first shot you can see that Mr Kipling is not present, but in the next shot he is.
Continuity mistake: When Dave enters the room with champagne glasses to celebrate his terrible idea, in a brief shot as he enters he's holding the glasses upside down. We cut to the other angle when he asks Alex to help him, and they're now held the right way up. As she takes them off him the angle switches again, and they're back to being upside down. (00:12:00)