Myself and a friend were both doing the Legacy of Power: An Innovative Approach quest. Upon leaving the instance I checked to make sure my AA exp was disabled and that I would gain full Adventure xp for the quest turn in. Upon turning in the quest I was not given any Adventure exp and only rewarded with AA exp. My Adventure xp was not disabled from quest turn-in's.
I missed your post and started a new one. Can you add what your xp bonuses were and what level you were when this happened? Might help them narrow it down