Campaign design questions

[Shan]

Hi all! I am working on my first-ever campaign (fixed core) and I got some unresolved issues... I hope someone can help me!

Core Units: Now, I started to buy a core force, then I re-arranged the company organization, etc, and I saved this in a separate file as a starting point for creating new scenarios - is that the way to do it?

When I changed the command rating, experience, etc, of the various commanders (I just figured out the significance of this +how that works AFTER creating 3 scenarios already), does this somehow get transferred form Node 0 scenario to all the others, or am I screwed and have to re-do all subsequent scenarios?

Deployment + Auxiliary troops: I created an 'exercise' scenario as the first one in order to be able to use Aux units from the first real battle on - now, when I tried to play that part, I found that by accidentally deploying the Aux units as well, they somehow got 'duplicated' - now I got that unit twice! In the campaigns I downloaded, I was never able to deploy the Aux units - what did I do wrong here? Was it maybe because they were loaded on their own vehicles?