Yes the Compass '40 scenarios were an expansion pack for Alamein '42 title created by Volcano Man with the help of Steel God, since the Gold upgrade they have been included by default in the title.
I don't have Alamein loaded at the moment but normally VM includes notes with his scenarios which you may find included in the game files, if they do exist then they
might explain the reason for the quality ratings?
I am certainly not an expert on this campaign, but were the 6th Division facing their first action, if so that might explain why they were C rather than B quality?
If I get to chat to VM I will certainly ask if he can remember, but these scenarios were created a long time ago now so it might tax his memory.