Other mistake: Sully climbs up the helicopter chain in the final scene with a bag full of gold. Assuming modest dimensions of 30x30x30 cm for his backpack, that means that he was carrying at least 40 kilograms of gold on his back, but he tosses it around like it's full of fluff. And when he hits Braddock in the face with it later, he's tossing 40 kilos of gold at high velocity at her face, but she shows up later without a scratch.
Trivia: Nolan North, who does motion capture in the games for Nathan Drake, is on the beach at the resort. He asks Nate and Chloe what happened, and they say they fell out of a plane. He says that happened to him once. He's referring to the third game in the Uncharted series where similar events happen.