Human No More
I mean which patch is installed with the game - on the main screen, it should say it, the latest is 1.02, but if you have steam, that keeps it up to date to the latest so it should certainly be 1.02.I'll try to answer your questions HNM as best I can.
Right well I'm pretty shocked that even after you did all that work that you didn't get it. I have the Standard Edition on Steam so I don't have the special edition. Also I have never player the RDA campaign. Although sometimes Advent has a different save file with the RDA campaign and he's normally finished it. So I suppose you could try the RDA campaign (Maybe get someone else to do it)
What level Echo Chasm is patched to: Well I'm not entirely sure what you mean here but you get to choose the level from the Ikran trainers ie when you fly to different locations.
Looks like the other campaign may be the key...