The filming camera shows shots as Rick saw them through his own camera, when he was shooting his father and his father's mistress arguing by her car. The freeze-frame of the father putting his hand on the mistress's face is his hand and her cheek that are closer to Rick. When Rick is developing the prints, the father's hand is on the other side of the woman's face. Even if the print were reversed, the hand would be on the side of the face closer to the camera.
The word sheriff is misspelled "sherriff" in the closing credits.