At the top of the show, when STRIPE lands at the garage with Courtney on his back, the blood on her forehead has switched sides. The shot appears to have been mirrored.
Henry Sr. is talking to Paula and Artemis, and Courtney walks away from them. Then Paula and Artemis appear ahead of Courtney, even though Henry Sr. is still behind Courtney.
At the 35:35 mark Courtney has a chat with Pat after her confrontation with Brainwave at the school. For the entire conversation her face is miraculously free of her scratches and bruises that reappear later in the show.