I've seen further explanations that make it even more confusing.
This one is suggesting she got up and left the room for whatever reason and the door locked behind her , she couldn't get back in and couldn't get into any of her friends rooms all on the 9th floor , so she went up to the 10th floor in the hope to drop down onto the balcony of her room, her room was 9A , why is it then she went to room 10E.
The idea is she heard one of the lads who was arrested knocked on the door went inside went into the bathroom and tried to climb through the window , and when she couldn't get through she went out onto the balcony and dropped in the hope to get down to the next floor.
If this is the "official" theory then I'm baffled at the idea an intelligent woman, all be it still pissed would try and drop down to the floor below, they aren't balconys as such, all they are are railings across the windows that you open, giving the idea of a balcony , they don't stick out for anyone to drop onto,
also I dont believe she couldn't get back in her room, a few loud bangs on her door one of the party of 20 who were on the hen do that were all on that floor would surely open their door to see what the noise was, out of 4 or 5 in her room someone would hear her knocking or someone on her floor.
The truth will never be realised sadly , no evidence , and explanations that although unbelievable in any other situation could be slightly plausible on a hen do in benidorm, its a shame there is no other cctv other than the one showing her and a few others returning back.