The *stalls* that are on either side of the one Sophia and Max are either structurally, connected to or are so close to, the one they rented. Therefore, the nearest stalls would have also suffered damage from the fire. However, there are no burn marks on the walls of the stalls next to theirs.
While Rose was telling a story about St.Olaf, she said the maker of a vehicle had double vision and therefore put 8 wheels on it instead of 4. However, if he had double vision, there'd only be 2 wheels cause his vision would make him see double than what was actually there.