In one of my PBW games I was able to get a large population of oxygen breathers (I'm none), so obviously I used them to colonize oxygen planets.
In order to accelerate population growth I'd been moving people around from my crowded to empty planets. Now here's where things start to get odd... I noticed that in some cases I'd removed all the oxygen breathers from oxygen planets, leaving only 1 or 2 million none breathers. What then happened was the computer started treating these planets as domed colonies
Now I have funky planets with 18/3 facilities.
Is this supposed to happen or is it a bug? If it's a bug is there any way to fix this problem other than abandoning and recolonizing the planets?