When Fester falls asleep due to Morticia's music, his head droops to his right. In the next shot, it droops to his left.
After Gomez puts himself to sleep with music, he lays on the couch with his face pointed straight up. Just before Morticia wakes him up, his head droops to the left.
When Fester looks at his hour glass watch, in the wide shot it is on his left arm, but in the close-up on his right.
When Lurch puts Fester back in his chair, Fester is supposed to be asleep but his feet move to push himself into a standing position.