Definitely odd but in game that would be explained away as the planet has ruins, thus it was settled by the domain and subsequently lost along with its new terran-lite biosphere during the collapse. I think it would be neat to see more terraformed and failed terraformed worlds. Like one where the soil nanites borked up or the planet is covered in a mat of noxious algae scum that was supposed to kickstart the atmosphere. Lot of fun stuff to find. I think my favorite so far is when a world has pollution and the description. I can't want to see what odd encounters and inplace faculties we will find in subsequent versions. My big hope is we can tech raid ruins and deciviilized worlds for rare materials and items.