Adler you arer correct, it is due to your having the AoI II in the conquest directory.
I laided down to sleep and it came to me that had to be it. I took a save from my last game that was also a scenario game. I uncompressed it, so I could read it in hex. I looked at your save and it said, as I listed earlier, Conquest\AoI II.....
The one from my save said, Scenario\........
So most likely, too late to test now, players could copy the stuff to their conquest folder and it would run fine. That is the way that solves the fact that the pediacons we have does in fact have the Stadium.
Tomorrow, I will zap the save with to point it to the Scenario folder and see, if it works for me. If it does and I think it will, I will post the corrected save. That would let players use it with no change and you can put in the scenario folder and all will be on the same page.
It is not in the folder the game is looking for it. I realized that they must have a means in the save to know where to look for pediacons and such and sure enough it is right in the the save at x'2A offset.