Lainy attends Kate and Shirley's joint gender reveal party and they all gather outside, around the baby piñata. Rawn (Shirley's husband) is wearing a white baseball cap with red sunglasses around it. Shirley begins a speech, then halfway through (when she adjusts the phone Rawn is holding) the sunglasses have vanished. They then reappear again afterwards.
When Lainy is shouting in class, she writes the numbers 3 and 2 on the whiteboard and crosses/circles them. In the following shots their visual appearance dramatically changes a few times.
When Lainy first meets Josh in the coffee shop and then also with Kate in the following scene: her bag straps are constantly changing position. They are different colors on either side and the strap color keeps alternating.
Lainey would have been fired from her job as a teacher and charged with destruction of property and attempted arson for burning the books and lascivious behavior for discussing "threesomes" with a class of middle school students. Also she would have been charged with theft for stealing the "baby belly" and reckless operation of a motor vehicle and property destruction while driving the Zamboni.
When Lainy is upset at the restaurant with Dave, she leaves her purse behind at the table.