In the scene where Pablo (Ray Santiago) is in the back seat of the Buick, he begins to frantically draw the face of the Necronomicon on a piece of paper. When he starts to scribble, he draws on a piece of blank paper stapled to another piece of paper (the staple is in the upper left-hand corner). A quick moment later, he hasn't stopped drawing and the paper is suddenly a bill from "Mainbury Motors", as well as now being a single sheet.
When Cindy, the Deadite mother, loses her arms, both amputated limbs are right-handed.