Just after Norma kicks Norman out of the car for the 10 mile walk home, Dylan sees him and gives him a ride home on his motorcycle. The helmet Norman puts on is shiny black, but the helmet during the ride is matte black.
Emma's oxygen tank is using a continual flow regulator on it. With this regulator, she would only be able to go about 20 minutes without changing her tank for another full tank. She should be using an "on demand" regulator designed for the "M6" cylinder that she is using.
Oregon doesn't have bail bondsmen (one of 4 US states that don't), so Norman couldn't have gone to "John's Bail Bonds" for bail. Also, if he's 17 (as stated in the previous episode), then he couldn't legally post bond for anyone in any state, since he's a minor.
Norma's car has AZ plates on the front and back. AZ only requires plates on the back of the vehicle and only issues one per car.
When Norma is trying to disprove that Shelby was involved in the Asian sex trafficking, she shows Jiao a newspaper with the headline "Local Sheriff takes top honors at 23rd Annual Woodchuck Festival" with a picture of Shelby below it. Shelby is a deputy, not a sheriff.