In the beginning when Mandy is in the stagecoach, she's wearing red lipstick. In the shot when she says "oh mercy, we're all going to die," the lipstick is gone. Then in the next shot of her, she has lipstick on.
When Eve runs the action on the rifle She is holding, Mike says "that's a Winchester .30-.30, yea, that's a beautiful rifle". When clearly, it is a Browning BL22. The short throw of the action, and in later scene when she is on top of the stagecoach, it is clear to see it is a Browning BL22.