When, on the 4th evening, I returned to the hostel to find that not only was bed 13 still occupied, but bed 7 now had a new occupant as well, I was not remotely surprised. Fortunately, it was in the evening during regular hours before anyone was asleep. There were only 3 other girls already in the room, and all of them were awake and chatting when I came in. I saw at a glance that my beds were not available and immediately returned downstairs. The man from the reception desk came upstairs with me and, after checking that everyone was decent, came into the room.
Here I explained, once again, that I was supposed to be in bed 13, but there was a person (not present but with her belongings left on the bed) who had taken over that bed the previous night. So I had spent the previous night in bed 7, but there was now a person in that bed as well.
The person in bed 7 added that she was actually supposed to be in bed 8, but that appeared to be occupied so she had taken the bed above it. The person in bed 9 chimed in that she was supposed to be in bed 5, but that appeared to be occupied as well.
The frazzled man from reception tried to remember all of this at first, but finally had to return downstairs to return with a piece of paper, notating where we had been assigned and where we all now were sleeping. He also stripped bed 5, figuring that that was the best way to figure out who was in that bed, and asked us to send to reception anyone we saw occupying bed 3, which was also supposed to be empty but too covered in personal belongings for him to strip.
Throughout the remainder of the evening, girls entered the room only to immediately leave again, returning momentarily with the man from reception, informing him of which bed they were supposed to be in. Apart from one girl peacefully looking at her phone the whole while in bed 14, no one seemed to be in the bed that they were assigned.