[Bug] Sith Inquisitor Story, incorrect response from Kalatosh Zavros at the end.

On the last stage of the quest "The Dark Council", the time comes to either free or keep the ghosts you've gathered throughout the story. I chose the DARK SIDE option regarding all ghosts, taking them with me forcefully.

You are presented with a choice during this conversation to free the ghosts, or to enslave them forever. I choose to keep them against their will. It is at this point the ghost of Kalatosh Zavros claims that I did not bind him and disappears. HOWEVER, I know for a fact that I chose the dark side option earlier in the story to bind Kalatosh Zavros against his will. The ending I am receiving is contrary to the choices I made earlier in the story.