Revealing mistake: When Jake is driving Andrew to Melanie at the battlesite, Jake is driving with the truck in the park position. (01:11:00)
Suggested correction: Or it's a manual 3 speed on the column in 2nd gear while driving slowly through town.
Plot hole: If Bobby Ray and the rest of the town knew about Melanie getting engaged then they would have known she changed her last name to Carmichael before she went to visit Bobby Ray at the plantation with the "reporter", so Bobby Ray wouldn't have been surprised she "lied" about their name.
Suggested correction: I believe Bobby Ray's reason for being surprised is misunderstood by the writer of this post. Bobby Ray is surprised at realizing that Melanie has been lying to people in New York about her Alabama past; not that she changed her name.