The checkerboard is set up incorrectly. Each player should have a light rather than a dark square at his right lower corner.
There are no lenses in Floyd's glasses. It was probably always done this way, it would be harder to see his eyes with the reflection off the lenses. There are many closeups of Floyd in this episode making it easy to spot this.
In the last scene Aunt Bee is trying to cut Opie's cowlick, which is at the back of a person's head, but she calls it his "widow's peak," which is at the very front of a person's head.