Im trying to create a repeating drum track in which the pitch shifts every 2 bars (AABB pitch pattern repeated).
 
How do I edit the pitch on the B parts, and if possible for multiple notes in the bar at once, or if not then at least one by one until I have them right?

On the EDIT page, select the drum you want (from the buttons of all 18 drums). Turn on the pitch module and adust Main (pitch).
 
You can also select the drum from the KIT page, by clicking on the name on the console strip
 
 
SORRY, I didn't read properly
 
I dont know if you can automate that. SO I would save as 2 separate kits. And switch between them.
 
 

Kamikaze
On the EDIT page, select the drum you want (from the buttons of all 18 drums). Turn on the pitch module and adust Main (pitch).
 
You can also select the drum from the KIT page, by clicking on the name on the console strip
 

I tried this but it changes the pitch in every bar / note, not just on the specific notes I need to change.
 
EG I need the kick drum in pitch A for 2 bars, then in pitch B for 2 bars, not A or B for all 4 bars.

Those controls may be automated.

SORRY, I didn't read properly
 
If you can't automate I would save as 2 separate kits. And switch between them.

You can have more than one snare or kick in AD and most VST drums. Just tune the 2 kit pieces as desired and play the part that way. 
Example. Kick in A on C3  Kick in B on C#3 
 
If you look in Session drummers samples you'll even see they have sampled snares and whatnot in different tunings. 

You can use the flexi options to assign a second kick drum

Kamikaze
You can use the flexi options to assign a second kick drum

Aha this could work, so if I can insert a second of each drum Im using and rune it differently. Will try that later, I already shut down the computer for a break (just doing 4-8 bars worth of a single instrument is very draining to me and I hate doing it, but my lame brain is musically gifted and magics up thousands of endless melodies instead of being good at something that would actually be useful like maths). 
 
Cocaine would help.

Right well Im straight back to it after a nap, dont want to waste my current spike in focus and motivation.
 
So how do I insert another kick drum into the drum map / kit for AD2?
 
I have thhis track template working, fortunately this time it took me less than a minute to load it up and get it working:
 
https://www.cakewalk.com/Support/Knowledge-Base/2007013364/Setting-up-a-Drum-Map-for-Addictive-Drums-2-in-SONAR
 
But trying to make a track with the same drums in different pitches is new to me.

No need for a new map. Use note 47 (Flexi Hit A) for the other kick. Then in AD2's Kit page, choose the kick into the Flexi 1 slot