Force Sensitive Archive

So im doing this quest yet again, and today i got lucky. Found 1 on teh second mission and a natural lair. So i killed 4 from the natural lair but I DIDNT GET ANY CREDIT. No system message "you have defeated your foe and are close to accomplishing your padawan trial quest." Is this a known bug or am i the first to get screwed this way, because ive never heard of it happening before