Other mistake: When in the tub in Arkansas, Wyatt is bare chested. In bed with Josie he's suddenly sprouted a lush garden of chest hair. (00:48:06 - 02:02:44)
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Suggested correction: Him in bed with Josie is over an hour later in the movie, and in the movie time, years have passed. Him going from a young man to a much older adult. Plenty of time to grow out chest hair or decide to stop shaving his chest. He's a much older man by the time he's with Josie.