When the soldiers arrive at the house before they enter it is daylight. In the next scene when they enter the house, it is pitch black.
At the end of the film. the two Confederate soldiers find two gold coins by the body of the beast. A soldier picks one of them up, but the other one vanishes between shot without anyone picking it up.
When the outlaws find the father's body strung up in the cornfield, his hands are wrapped in burlap. However, a flashback shows that his hands were bare when he was strung up and all the townsfolk left.
When people are out in the storm, they are getting soaking wet in the rain. When they enter the house, their clothes are dry. And when they walk to the barn toward the end, they are soaked by the rain, but their clothes and hair are dry once they enter the barn. Near the end of the film, William has apparently spent the night on his knees in the rain. But in the morning, his clothes and hair, like the corn stalks, are dry. Only the dog appears wet.
It's pitch dark outside, and the only light supposedly comes from the lanterns the characters carry with them around the house. But there is uplighting illuminating most of the windows from outside. There is also unexplained light coming from other sources lighting the scenes.
The lanterns don't have an actual flame. There is no flickering, only solid stationary light.
Near the very end of the movie when William is kneeling over Annabelle's body in the morning, when it shows her corpse, you can clearly see a visible nipple ring through her shirt.
Fairhope, Alabama was established in 1894. In the opening Fairhope scene, 1863 is the given date for the action.
At the beginning of the film, when William dismounts as he arrives to the bank, the modern, anti-slip pattern rubber soles of his boots can be briefly seen.
When Annabelle is alone in the upstairs bedroom, and the closet door opens, a crew member's hand holding a stick to push open the door is clearly visible.