So what you are saying is that the discoveries can be rewritten by someone in different game mode? That doesnt sound too much fun to me.
Not just a different game mode.
They could load a planet altering mod like Better Worlds, get a new version of a planet previously discovered, claim that, and since it was the latest version discovered that is what will show in the discovery list. Basically game modes, patches, mods, can all be used to claim the entry in the discovery list.
Worse is that unlike before where one could see all the versions discovered and compare to 3D space to know what the world is like, now that is not possible.
As the example there shows, on NORMAL the discovery list shows only the values for SURVIVAL because those were the last discovered. However, in the 3D environment, if you land on the planet, it is still the NORMAL version, with the NORMAL name, and NORMAL conditions.