Seeking Clarity on 25 man loot in FL HC

Good morning; I was hoping to grab a blues attention prior to the launch of firelands in the hope something could be cleared up. On the PTR for FL it was noted that some 25 man heroic kills were yielding 5 pieces of loot as opposed to 6.

Nothing in the patch notes or changes has indicated that this ought to be the case; so was it a bug on the PTR causing this or is it intentional? Would be wonderful to get a clarification on this, thanks!