Perhaps there is a list of units, name lookups, or such which you need to edit in order to have # units = # data entries? Personally I haven't been bold enough to go faction-deleting and all the files I mentioned were just ones that had "casse" or "britons" in them. So any file that might need to refer to a unit's specific name or such was not included. It'd be best if you posted a thread in the sub-mods section and asked for help, or better yet check out the main modding fora for RTW in general and post any ?'s there.