Ok, how about this then:
Yesterday, I wanted to adjust my windage after shooting at 200, 300, and 400 yds. I also wanted to save my last box of better ammo for the steel silhouette at 400 yds. So, I fired Wolf ammo at a target at 100 yds for my windage adjustments. (Yeah I know it's crappy, and it's a different ammo, etc.)
Anyway, I fired one shot (outside the black circle at 10:00). I adjusted the windage after that one shot.
Then, I fired the three shots one after the other (inside the black circle at 10:00). I adjusted the windage again after those shots.
Next, I fired another single shot (just on the edge of the red square at 3:00). I made one more slight windage adjustment.
And then, I fired the last shot (just inside the 1" bulls-eye at 12:00).
In my mind, those are four separate and distinct shooting events. To me, it is no different than if I had a single sheet of paper with four smaller targets on it: fire one shot, change POA; fire three shots, change POA; fire one shot, change POA, fire last shot.