[Sten]

It has been clarified in the following thread: ( http://thaypw.org/showthread.php?tid=273...ll+changes ). But it's simply to avoid people rushing dungeons, by cutting down the length of certain buffs.

so why couldn't the blackguard spell based feat be reduced as well rather than disallowing it to stack with the spell..just kind of confused by the logic

Without actually knowing the reason behind it, my guess it that stacking two spells is an odd thing..And could lead to questions like "Why can't this spell-x stack with potion or spell-y from a different class"

And stacking bulls strength on yourself like that, is at least in my view overpowered.