I'm not sure of the exact mechanics of it. It may have been complications from installing BI or a mod after the fact (I used to play the fourth age mod off of 1.6). I absolutely love eb, which is why i can stand playing it despite the history of constantly losing mostly finished campaigns.

I can go back to the fixed s1 save, but Ill be hard pressed to wipe out an army every turn since all of my legions are in africa save 1 and a half on the northern border.