At the very end, when the women are riding in the wagons going to meet their husbands, the Italian woman is seen in two different places on the same wagon.
At dusk there is one fire which lights the camp. A man is shot by one of the women and falls right onto it, more or less putting it out or certainly lessening the blaze by a lot. Yet right afterwards the visibility in the camp remains as good as before instead of being somewhat darker.
After digging up the Quackenbush grave and retrieving the rum, they left the shovels.
After their long desert trek, everyone runs for the water. None of the animals drink.
Buck tells the bachelors that the Donner party couldn't compare with what his women have been through. Half the Donner party died of starvation or freezing, or were the victims of cannibalism.
Laurie is seen grabbing a couple of the women's arms after they remove her dead body out of the wagon during the thunderstorm.
A couple of the dead women are still seen breathing heavily after the second Indian attack.
About 30 minutes into the film there's a scene where everyone is supposed to be bedded down for the night and are disturbed when one of the men tries to be with a woman in her wagon. But the scene is too brightly lit for a nighttime scene (even with a full moon) and was obviously shot in the daytime.
During a shooting lesson one of the men tells one of the women to "aim low that will make up for the recoil". When shooting a gun the bullet has long left the barrel, before the barrel begins to move in recoil. Aim low and you'll miss low.
After the second Indian meetup the first they left without fighting.
But the second Buck is asking to account for the dead "how many did we lose?"
Susan Brewster, Then the camera cuts to Susan just as she is taking a deep breath. She is supposed to be dead.
All the rifles used in the film are single shot, M1867 Remington Rolling Blocks. As the model number suggests, they hadn't been invented until 16 years AFTER the year (1851) the film portrays. All Pistols used are the Colt SAA 1873 (Single Action Army) in various barrel lengths (4.5" - 6.5"). The only pistols available at that time were single shot percussion (cap & ball) and Colt percussion revolvers such as the Colt 1851 Navy.
In the movie, which was supposed to be set in 1851, Buck is using, what appears to be, a Colt 45 Peacemaker. Only problem is, this type of revolver was not invented until the 1870's.
During the sequence when the women are learning to shoot rifles, many of the weapons do not fit the 1851 time frame. Most noticeable is the model 1873 Springfield cavalry carbine. In fact, any rifle firing a metallic cartridge would have been extremely rare at that time. Muzzle loaders would have been the norm.
Marks on the ground from a vehicle with tires visible when the wagon train first starts out.
If it was inevitable that the women would have to jettison all of their personal items at the beginning of the desert, they should've been advised at the beginning of the journey not to bring anything.