i'm not sure
however, one quirky idea, one i grab from Virote Considon here at cfc, is to crap out of your game, go back to the title screen, start a base vanilla game WITH SCIENTIFIC LEADERS ENABLED, get it to the first turn, crap out of that, then reload a new game of AoI. confusing, yes. but this got rid of those annoying barb units that would magically appear in scenarios, even though barbs were not enabled; ie start vanilla game with no barbs, crap out, start AoI game. just stabbin' in the dark here