First, while playing as Ordos I conquered a sector right next to the Harkonnen home base which had a secondary objective to kill a Sardaukar general who opposed allying with Ordos along with his troupe. I did that, and in the next mission, I get a secondary objective to find lost Sardaukar and guide them to my base. When I do that and they approach my base, surprise, turns out they were actually Tleilaxu Contaminators and I'm told to kill them all. However, in the mission debriefing I still get berated for not finding the Sardaukar. Is there a separate group of "real" Sardaukar somewhere? I've explored the entire map, and I haven't found anything.