The name of the city is São Paulo, not Sao Paolo.

Young Hodor has a scar in his forehead, I don’t recall this scar from the first time we see him. So probably he was hit by a horse and some time after had a seizure. That explains Ol’Nan tale of how Hodor became Hodor.

One possible solution for the Jon Snow problem is that he was never dead. Melisandre used her magic to make someone else look like Jon and this person was the one killed, while the real Jon is someone else (let’s say Ollie). A similar plot was used in the books to keep Mance alive and the last scene supports that…