You will also find a few of your buffs wont stack as well. Such as the Aura line will not stack with the templar health buff (dont know the name cause im an inquisitor)
I find it extreeeeeemly annoying to be even in a group with a templar of equal or less lvl than I, and have my master reactive get booted by a simple adept1 or 3 of the templars.
REALLY wish they would go back to the stackable versions.