This seems like a pretty major bug unless I am missing something but here it is, very easy to reproduce. Unit size only changes the health on monsters and heroes. Unit counts never change regardless of the actual setting.

On medium: Noble has 7k health, spearmen have 32k (144 men)
On ultra: Noble has 14k health, spearmen have 32k (144 men)

Thank you for bringing this to my attention, I have to admit that I made the mod with the assumption that Ultra would be the default and that changing health bonus and unit size would be universal regardless of what unit size you actually use (i.e. the stats I mentioned would scale down accordingly). It's an oversight on my behalf and I apologise, I will look into it and see what can be done.

Every start of the game with your mod is crashing.