Revealing mistake: When Logan goes looking for Max at Jam Pony, as he starts talking to Normal there is a woman in a blue jacket with a black-and-yellow bike helmet walking behind him. She travels past the group and can be seen heading for the lockers behind OC and Sketchy. After Normal says, "I can't help you," the same woman walks behind Logan again, going the same direction. (00:16:55)
Revealing mistake: When Max is holding Lydia upside down from the window, in one shot of Max you can see the harness used to hold Lydia.
Revealing mistake: When Max knocks Darius down in the projection theater, he lands against the door. The entire door and frame shake with the force, but he barely touches it. (00:37:25)
Art Attack - S1-E12
Revealing mistake: Max jumps onto the dumpster behind the office and up to a window. Both times she is replaced by someone with a very different hairstyle: short instead of merely held up (slowmo helps). (00:20:50)
Answer: Max's disease is specifically tailored to work only on cells exhibiting Logan's genome. No one else would notice it.
Phoenix