Goofs

Ed has frozen Rye's body and takes it to the butcher shop to cut it up for disposal. He is shown grinding the parts, bones and all, which isn't possible. To grind up the body parts, the body would have to thaw first, then have the tissues separated from the bones.

At best, he would have been able to cut up the frozen body with the band saw into smaller pieces for disposal.

After Milligan and the Kitchen brothers are stopped by Hank Larsson, the one who is driving gets back into the driver's side of the car, and sound can be heard of the door opening and closing while the camera is focused on Milligan in the back. But in the corner of the shot, the edge of the driver's side window and door are visible, and it never opens or closes.

There are two brothers and it's possible the car door heard is the brother getting into the passenger side door.

When Ed cleans the blood from his garage, it has been several hours since he and his wife ended up killing Rye Gerhardt. But as he cleans Rye's blood, it is still red. Blood, however, turns black when it dries. First it gets tacky and turns maroon. Then it hardens and turns black. But as Ed cleans it the next morning, it is still very wet and red. This mistake is repeated later when Lou goes back to the Waffle Hut. It has been an even longer period of time, yet the blood on the table where the judge had bled out was still very wet and red. None of that blood had dried in all of that time since the murders, demonstrating that the film crew had used some kind of liquid prop and just left it in place for the subsequent shootings rather than replacing it with more realistic aged and dried material.

Given the severity of the situation, it seems unrealistically careless of Ed to turn on so many lights in the butcher shop.

Quite the opposite. The best way to avoid suspicion is to be open and aboveboard. Attempting stealth by burning only back-room lights is to invite check up visits by police or watchmen.

The glasses worn by Hank are definitely not from 1979. That type of rectangular lens has only been available recently, long after 2000.

Rectangular glasses had a fashion surge in the 60's and the 80's, but have been in use since the Civil War.

When Lou Solverson and Hank Larsson are swapping war stories on the steps of the diner, Lou tells of his witnessing the combat death of a comrade while on a patrol boat in what is presumably Vietnam in 1974. Most US ground/sea forces were withdrawn after the ceasefire in 1973. Any remaining personnel would not have been witness to, or involved in, any combat situations by 1974.

Sitting in front of the Waffle Hut Lou talks about his experience on a Patrol Boat in the Bo De River. As the Bo De River IS in Vietnam Lou is obviously talking about his experiences in the Vietnam War. But Lou says his story takes place in 1974 and by then US conventional forces were out of Vietnam. The Paris Peace Accords of January, 1973, halted the involvement of US forces in combat and two months later the last US troops were pulled out of Vietnam. Though covert US personnel (CIA) probably did operate in Vietnam up to the fall of Saigon in 1975, NO one would have been operating something as overt as Patrol Boats in 1974.