In the library scene after Madison says "Then we'll just have to show Skye that some boys are out of her league" Chloe starts to smile then when it cuts to the next shot Chloe smiles again.
In the scene outside of the pool Olivia and Chloe's facial expressions change between cuts.
In the basement scene, when Charlie presses the knife to Madison's face, it cuts to a different angle and he presses the knife onto Madison's face again.
Obvious stunt double when Charlie knocks out Madison on the table during the chase scene.
In the beginning of Lilly's chase scene she says "What are you doing?!" and her mouth movements don't sync right.
When Madison is talking to Olivia and Chloe in the library when she says "Alright Olivia, what are you peeing your pants about?" it looks like she's saying something completely different.