When Jimmy is being removed from the horse, the duct tape holding his legs to the stirrups disappears between 17:47 and 17:55, without Cole changing position as he undid his hands.
When the Reservation Police Captain changes slides with kay they indeed change slide and barrel. The only problem with this action is that every Glock has three places where the serial number is located. These are slide, barrel and the receiver. So the next time the police captains weapons is checked the numbers don't match. Normaly this will lead to a number of questions from the armorer and the parts can be traced back.
John mentions that the Bible says that cremated people can't rise. The Bible mentions absolutely nothing about cremation.
When Father Bob gives his sermon, he talks about the ninth commandment having nothing to do with lying but rather with support of your community as he is trying to convince a member of the congregation to not tell what he saw (regarding Kayce). The ninth commandment is "Thou shalt not covet thy neighbor's wife". He should have referred to the eighth commandment, which is "Thou shall not bear false witness against thy neighbor"
At about 1 hour 7 minutes, John Dutton is looking at the future site of Paradise Valley with utility flags in the ground. It was wrongly stated that the 'Green flag is water' and the 'Blue flag is sewage". It is in fact, Green flag is sewage and Blue flag is water.
When the Reservation Police captain changes slides with Kayce so that the bullet from the burned man won't trace back to him, changing only the slide wouldn't do it. To be sure, he'd have to (just as easily) change the barrel as well. Appears they exchange barrels as well.
In the cremation scene, when the wranglers lift Lee's body from the coffin onto the table, you can see the long-deceased Lee raise his hand up and onto his belly as he's being transferred. This happens immediately before a wrangler belatedly doing the same from his upper arm.
At 4 minutes 22 seconds into the video Kayce Dutton falls off a tractor. At one point he was behind the pole and when he stood up he went right through the pole on the tractor.
The coroner's report would have been saved to the cloud, not just on the laptop, so Rip could not destroy that one.