When I use "Soil Enhancement" to upgrade a planet's quality (i.e. from 11 to 13) and then save that game; if I exit the game and load the game back, on the main screen or the planet list screen it says that the planet is back to a quality level of 11. However, going into the planet screen for the individual planet I sount that there are 13 usable tiles (including my upgraded tiles).
Thanks,
Jorge