Made an in-game ticket and was told to make a bug report. So here it is, I have 2 active accounts with 2 active subs with both killing the 1st boss in SE. This was CONFIRMED by the game master via ticket. Only 1 account was given the boost and the other was not.
So while my issue was confirmed by the game master, nothing was done. Please fix this Blizz. It was also confirmed that the program clearly states you get 1 per active account.