Confinement - S2-E5
Continuity mistake: Ruby asks Ash where the the Kandarian Dagger is. He says that it was confiscated by the police. In the previous episode, she had and used it, and they have not interacted in the intervening time period.
Continuity mistake: During the fight between the deadite woman and Kelly in Ash's trailer, the deadite's fingernails change from long to short in one shot.
Revealing mistake: The woman becomes possessed while the police are attempting to arrest her. She turns her head around and cracks her shoulders so she can walk at them backwards. They did not change her hand positions, so her right hand is where her left should be and vice versa. (00:11:00)
Home Again - S2-E9
Plot hole: Old Ash travels back in time to 1982 to snatch the Necronomicon before Young Ash ever finds it (which should, presumably, erase all of the evil events from the original Evil Dead film right up to the present). Upon escaping the cabin, Old Ash finds that the timeline has self-corrected, and his amputated right hand has reappeared on his arm. But he is still in the 1980s. If the timeline had truly self-corrected, then Old Ash's car, his friends, and he himself would have vanished instantly from the 1980s, because the purpose of their mission never existed.
Deliberate mistake: Inside the home that has been infested with Evil, the state police confront a possessed girl who attacks them. After some futile gunfire, the possessed girl is still standing. The female officer goes for her backup gun, which for some reason is a small over-and-under Derringer (meaning she has two shots maximum). She ends up firing the Derringer five times in just a few seconds, with explosive damage and without reloading. Director Sam Raimi probably staged the 5 gunshots on purpose, knowing that a two-round Derringer was a ridiculously-limited piece of firepower. Raimi probably did this as a tongue-in-cheek tribute to Ash's bottomless double-barrelled shotgun from Evil Dead 2 and Army of Darkness.
Continuity mistake: The Michigan State Police arrive at a rural 2-storey home that has been overrun by Evil. As the police park in front of the darkened house, there is something like a million-candlepower flood light about 30 feet in the air, back-lighting a gnarly tree in the front yard and casting harsh light and shadow across the scene. The police exit their vehicle and, in one camera cut, the brilliant light has moved entirely into the backyard, now back-lighting the house. These can't be explained as yard lights: Upon entering the house, the police discover there is no electrical power on the premises.
Continuity mistake: Throughout the entire first season, Ash's 1973 Olds Delta 88 variably has 4 working taillights and then only 3 working taillights from one scene to the next (and even from one shot to the next).
Suggested correction: Time travel is not real. The rules of it are dependent on what the writers deem fit. Ergo, this isn't a plot-hole.
TedStixon
By that rationale, plot holes don't exist in any films, because the screenwriters are making all the rules. But, of course, plot holes do exist because screenwriters forget their own rules. In this case, the screenwriters chose to go down the path of correcting the Evil Dead timeline, but then they forgot to correct the timeline.
Charles Austin Miller
Baal was messing with time.