Other mistake: Jim Beavers, who plays Drew Thompson/Sheriff Shelby as a character, does not wear glasses in the show. The actor, however, does wear them off camera, and just above his ear, you can plainly see an indent of where his glasses sit in multiple different scenes.
Continuity mistake: The first time Boyd speaks with Ava's uncle Zachariah, the door behind Zachariah keeps switching between open and closed between shots.
Boyd Crowder: I've learned to think without arguing with myself.
Question: Mags poisons herself with the same "it was in the glass, not the jar" approach she took with Loretta's father. But we see her grab two glasses - one from the cupboard and one off a shelf. Does she slip poison in while off camera, or is it just that the cupboard/shelf glasses are always poisoned, trusting that everyone knows not to use them? Seems like a crazy risk to take.