Hi, sorry I took so long! There was some IRL stuff I had to deal with.
I've made a little mockup lot with a configurable staircases that show the behavior I mentioned. I roughly marked landings and openings with fences and banisters, so you should be able to tell which floor tiles are unwanted.
I realize there are ways of getting rid of them, but it's convoluted and not very logical. It's especially problematic with basements underneath raised foundations, as you can't reliably get rid of those pesky floor tiles refusing to be removed. When you do, the floor geometry opens a hole into the void.
Again, I know that I can remove these tiles (with the exception of stairs leading to basements that are on raised foundations), but the fact that stairs behave this way is not exactly desirable.
I included a screenshot of the lot uploaded to the gallery. You should be able to find it! 🙂
