Eli, you should check to see if Maki and Umi were both locked into rooms as well. But on that note, Umi said she was 'pounding the door' to open it until it gave way- does that mean she didn't know about the keys? Also, check if any of the rooms are connected to one another and if someone can go from one to another without having to enter the main hallway.
To answer the first question – Umi was pounding on the bloodied door/aka not her own door. I’m not sure what you mean by ‘she didn’t know about the keys’ because the room’s key was said to be for their own room.
As for the second question – it shall hereby be confirmed that none of the second floor rooms are connected to each other, as you would have noticed such a thing during your time in your own room. (We’re not going to play the ‘this room only had access to this other room’ because that would be totally bogus *shrug*)
