Missing Units Glitch with Engine 4?

[Stonecutter]

I just finished playing Les Charnes and noticed what I believe is a glitch with the new Engine 4 for CM. Since I switched over and went back to try out a few older scenarios again, I have noticed that units have been deleted in some battles. It seems to delete tanks for the most part. As an example, Les Charnes went from 5 x Mk IVs to 2 x Mk IVs and Flowers of the Forest went from a full company of Mk IVs to only 8 x Mk IVs.  Has anyone else noticed this?