Yellowstone unmovable walls

[Zekvich]

It appears that my yellowstone portal in the bawg where grandmammy is has structures i cant move but looking at videos online others dont have these? I am trying to build a base here and have had to keep structures there as i cant move them, whats happened? :s

Edit: I found the answer that they are meant to be there but it looks like a bug because the walls are floating in space and not placed on a floor which looks super ugly so now i have to move out of grandmammys house and live on my own in the bawg, looks like she will have to deal with only having fish as company. IS THIS WHAT YOU WANT?