Revealing mistakes: After burying Charlie Schwartz, he walks by in the next scene on his horse while Cimmaron and Mr. Anderson talk.
Factual errors: On the DVD special features, images of Sarah Cunningham (as Annie Anderson) are used in the "Cast & Crew" information for Colleen Dewhurst.
Revealing mistakes: When Mr. Anderson is tying up Crazy Alice for the cowboys to ride, the horse changes from a dark-maned horse to one with a lighter brown mane.
Revealing mistakes: When Mr. Anderson is branding the calf during roundup, he only touches the iron to the calf once even though the brand on other livestock clearly shows two distinct O's. Before he brands the calf, one can clearly see that the iron is a single O.
Revealing mistakes: It appears that the Double O ranch has two different brands. During roundup and later in the film, the cattle wear a brand of two distinct O's separated by about 12 inches. In the scene before they start the drive, one of the horses appears to have a brand consisting of two Os connected horizontally. This brand should be the same as the brand the cattle wear. In addition, the connected Os might be called a lazy 8.