After Mrs. Heisner throws the chocolate shake at Fiona from the van, a close-up shows ice cream splattered on the window post of the van. A few seconds later, a long shot shows her driving away, only now the window post is perfectly clean.
After dinner, Frank picks up Sheila's dinner plate next to the sink, saying, "Let me get that for you." In the next shot, Sheila hands Frank the same plate he had already picked up.
While Fiona is calling Steve from the bathroom, she's actually not talking to anyone; her phone is on the home screen the entire time.
The subtitles have Lucy Jo's name as Lucy Joe.
While Fiona is walking home from her job, her friend-with-benefits pulls up alongside her and asks her to go out. She declines, saying she has to go home. However, given the side of the skyline, Fiona is walking north instead of south, which is the opposite of her home.