> The one in the boiler room is a kind of lock that does that, it's called a storeroom lock and exists in real life.
Can absolutely second this. The doors in my house literally use these types of locks where if they're locked while open then they'll lock the door when it's closed. Hence why the door was left slightly ajar when Diana found it.
> ... considering Eva was planning the murder for a couple of days she likely had plenty of opportunities to be sneaky.
While it's extremely flimsy I do agree with this too since Damon was in the same boat. However, it would've been nice for the game to clarify it at the very least instead of leaving it up in the air.