When Mike and Carol are preparing to sleep in the den, Carol's nightgown is a shade of lavender. Later, when Marcia enters the room, Carol's nightgown is blue.
Alice takes the cookies out of the oven then directly places them in the cookie jar. One would not do this in real life as the steam from the hot cookies would cause condensation, making the cookies go soggy.
After Marcia got hit by a football, she had flashbacks of being hit. The first flashback is very different than the rest of the them. After the football hit her nose, she covered her face with her hands. Her hair got stuck in the hands and also her hair was swinging more. The rest of the flashbacks matched the real event.
When Alice and Carol are preparing the two sofas in the family room for Carol and Mike to sleep on as their bedroom had just been painted, Carol states that this will be the first night that she and Mike have not slept in the same bed since they got married. That statement is an error as they did not sleep together on the night of their first family camping trip, where the males slept in one tent and the females slept in another tent. They also did not sleep together when Alice sprained her ankle while Carol was away tending to an ailing relative.