Sully appears shirtless but his multiple bullet wound scars have vanished.
It wasn't President Grant that made Yellowstone a national park. It was Teddy Roosevelt. It wasn't because the land was 'good for nothing' as claimed. It was because he said the land had healed him after his young pregnant wife and his mother died on the same night.
The acoustic guitar played at the Sweetheart's Ball was a 'Dreadnought' style shape. That style of guitar was not made in that point of history but was designed in the late 1920's.