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.
Other mistake: Ava previously borrowed a razor from another inmate to tidy up her unevenly-hacked hair. All well and good, except especially when seen from behind her hair has been perfectly bobbed and tapered, hardly possible doing it herself in a prison bathroom with a razor.
Other mistake: Raylan fires two shots into the above-ground pool, but it springs three leaks. Looking closely it does appear that Timothy Olyphant squeezed the trigger three times, but one blank must have misfired, and the three squibs went off regardless.
