Mutt - excellent questions. I'll try to answer them each in turn.
The 'P' and 'p' denote refits. One is the Phaser Refit, the other is the Power Pack refit. I am afraid right at this moment, I am unsure which is which. I can check to verify when I get home.
For the BC - you can only buy the one that is available. The '+' refit is available, as well as the Phaser refit. So, you can either buy a BC, or a BC+ or ...whatever the BC is with the + and phaser refit. That is a gap in my understanding of how FS implemented the different refits. I'll get you an answer back today.
Now, the way I am approaching the Mini-Campaign OOB's is taking the year (in this case Y168) and looking at the actual availability of refits. IN Y168, the Phaser refit was just becoming available, so I am limiting it to the Capital Ships in your Fleet Pool (the BC and CC).
One additional problem is that FS used the first possible year of availability for his shiplist, so while on the shiplist some ships show available, when consulting actual refit availability in SFB, you find that it was only available to a limited degree.
The DW was still new construction in Y168. Most were assigned to the Home Fleet. None were in the Red Claw Fleet as of this year.
There was no L-DN available to the Red Claw fleet in this year.
I think I should make a single CWL available (so 1xCWL, 4xCW), but let me confirm and get back to you.
I believe the FLG is a police flagship? Police ships are not listed with OOB and are excluded.
I'll have to get back to you on the CAL/F.
For the record, I am working on a more formal Mini-Camp resource. Ultimately, every race would have a single OOB to choose from for each of 4 different years. It would be a generic OOB, reflecting sort of an 'average' across all borders. However, since that is not ready yet. I am using the whatever is on the border of your opponent.