In the first scene with Joey and Lucy, Joey is seen wearing a Chicago Police Department jacket, implying that he is an officer. Underneath, he is wearing a Buffalo Grove High School T-Shirt, and the characters Joey and Lucy reside in Buffalo Grove. This is impossible given that all Chicago police officers are required to live within city limits.
When Cynthia jumps in the bay after the ladies meet Salvadore on the east side, she is clearly wearing a blue bikini outfit. When she comes out of the water, her outfit is now pink and remains pink throughout.