I would LOVE to see a developer response to this since I think, RAW, you are absolutely right, but I nevertheless don't believe it was ever the developers'intent.
PF1 - however same issue - and Return of the Runelords volume 1) part 4 page 51.
Awarding experience points for this portion of the
adventure can be tricky, since if the PCs fight and defeat
numerous initiates, they would in theory earn much
more XP than if they adopt a more peaceful or stealthy
approach to securing Baraket for themselves. To offset
this complication, when the PCs gain control of the Sword
of Pride, they should earn a story award of 1,600 XP. This
story award should be reduced by 400 points for every
Order of Resplendence initiate they had to kill along the
way, to a minimum award of 0 XP if the PCs kill more than
four initiates. In addition, the PCs should not earn XP for
killing more than four initiates during this adventure.
If you would rather not read adventure text - the gist is that they recommend an xp cap for certain monsters and to award xp if they are avoided.