AS suddenly fields weird armies and odd crashes

[Shadowwalker]

Hello all,

playing a Hayasdan game (M/M) at the moment with:
Bi.exe (Ferromancer's mod, only the exe though)
Phalanx mod
force diplomacy
RSII environment
Citymod (added 4 more large cities to Gaul and Britain, to make it easier for them to achieve their reforms)
Info card mod

Am in ~230BC and started invading the AS (after having defended since 271, fought at least one siege battle every round in Phraaspa, Karkathiokerta or Ani-Kamah since then).

First I took Arbela, Seleukeia and Babylon, then I divided my attention and attacked Ekbatana and Edessa. These were the first battles I just couldn't win normally.
I sieged the city, a wandering AS halfstack tried to fight me off, I won a clear victory, annihilated the city garrison in the process and ... crashed.
Not the well-known "after siege battle" crashes I usually encounter though.
Usually I crash after the battle map when the loading screen is meant to be brought up. Now the game loads the campaign without problems and I get to the window where I have to decide to occupy, expel or exterminate. Regardless what I try (and I fought both battles 3 times, every time choosing another option) - I crash as soon as I click the button. Script or no script makes no difference either as it seems...
Anyone ever had that?

Second problem is that the AS suddenly fields armies not available to them. I solved the battles I mentioned above with auto-win (which I don't consider cheating in this case) and sent a spy towards Susa. He found an AS stack consisting of all kinds of african troops: Maure infantry, Garamantine infantry and those Elite African Phalanxes (which are depicted as Vanilla peasants of course).
Since it was pretty obvious that this is a serious bug I tried to annihilate them with a single FM and repeated auto-win, but that made the game freeze completely. I even had to re-start the computer.

Is my savegame corrupted?
I have some older saves but they are at least 30 turns back (I do fixed saves every ten years in the campaign, but somehow I forgot to save setween them too it seems...) and I was really lucky with some battles (using a King's army that mainly consists of Caucasian spearmen, Caucasian archers and 2 FM's prooves to be difficult when fighting Argyraspides and and Hypaspistai )


Thanks in advance for any ideas how to solve this without going back in time.



EDIT:
Yes, I realized that the title is somewhat ... misleading.
To make that clear: No, the AS doesn't field odd crashes.