Hey Aenarion,
It's been happening for about a week now, after I changed all of the units numbers (I know the limit so it's probably not because of that,) and after I changed the Unit class labels and the wierd ones that supposedly don't work under column 53.
I'm going to keep figuring this out but you probably have to see what they're doing to understand- for example, I start a battle with a line of 3 units of Celticwarriors. They look find, (in formation) but when I order them to march the generals go way ahead, the middle guys wander around in circles and get behind, and the guys in the back go in the opposite direction half way across the map, then return. When they are ordered to charge only the ones nearby will do so, the rest wandering around and eventually attacking. Thus they get destroyed pretty quickly- and all the wandering makes them exhausted. It looks pretty crappy.
Thanks for your help,
Justin