When Ma puts the kids to bed, you can see the covers are rumpled. Then, when she attempts to turn off the lights, she hits the switch to put away the beds. When the beds come back down, you can see 3 of the 4 beds are neatly made and there are dolls instead of kids. When you see them in the next shot, they are as they were before they went into the wall.
When Tom kisses Kim goodbye at the train depot, her hat falls backwards and is barely on. In the next scene, from a distance, they are still kissing and her hat is back on.
When the Mayor and Sam try to visit the Kettle home, Ma shoots the hat off of the mayor with a shotgun from 20 yards away. The spray of buckshot from that distance would cover 20 square feet, and severely injure both men.