Ahh... I think I get the distinction you are talking about now. So, you are saying that if I never get around to downloading 2.3.0 then it will never show up here. This is how it is worded: OTA (over-the-air) Software Updates History - All release notes from OTA software updates can be found here.
That led me to (I think reasonably) believe that I would see all of the released OTAs, whether I had downloaded them or not, which I think is the way it should be... with a note appended telling me whether I have downloaded each to the car or not.