Creating Rooms & Floors to Edge of Map

Two things in one if that’s ok. I was wondering why I couldn’t draw rooms easily, then noticed you can only draw them bottom left to top right (a diagonal move up and to the right). In this record I’m trying to create them by drawing a square from top left to bottom right (diagonal move down and to the right) and again from top right to bottom left (diagonal move down and to the left) and I could not. Only when I draw from bottom left to top right could I draw my room. Not sure if this is a bug or UX thing, so I’ve tagged both.

I then filled the room with a floor on my 35x20 map, but noticed that when I move the room, the fill stops at the edges of the map. If I move my room to the edge, the fill stops short of the edge. Pretty sure this one is a bug. Hope this helps.