EV and KP had 5 each; so actually, you're wrong.
EV: The turrets arent a boss, so the droid is one, gharj is two, the council is three, and soa is 4. The puzzle isnt a boss.
KP: Bonethrasher, Jharg and sorno (one loot one boss), foreman crusher, the droid, and karraga... So i guess your right on that one :P