Hello, I just saw these updates. In your updated library map, I see the ground and upper floors now span the same number of screens. And if I understand your description correctly, the screens that have red door icons are where the stairways are now, and I see they now line up on the map.
This is exciting news. I think this in-game map will be a helpful addition. (During my original play through of the demo, I often got lost. I made my map to help confirm I had seen every possible location in the demo.)