It is quite obvious that ships are always in space. Most times you do not hold GFs in space anyway. With bigger fleets, you can not really organize units "as intended" anyway. As long as GFs and PDS are on their planets circle, everything else is OK.
Yes, ships serve no function on a planet, and ground units serve no function in space. The only time when clsrity is needed on where a unit is, is in multiplanet systems.