I think you misunderstand Beesting! He's referring to the bug that I experienced just last night.

I was playing as Great Britain and had just successfully invaded the United Provences with a full stack army. I started to lay siege to the regional capital and noticed that apart from the citizen militia there was a full SS Panzer division in the opposing stack.

Needless to say my line infantry were badly mauled by the panzer grenadiers and accompanying tigers.