I had to redo the encounter with both the windmill goblin and spike three or four times each. The windmill gobbo would surrender, wyll would talk to him, get his info and then kill him. After he killed him hed say "He was supposed to just be knocked unconscious so we could question him!!"
With spike, similar thing, hed react wrong to what happened and I finally got it right. I think its easy to miss that it went wrong if youre not paying attention