Dantia

I'm having the same issue. Basically, I went to the mill and saw the argument. I went inside and talked to the miller. Here I was able to pass a 14 point resolve check twice (one to put the weapon down, one to stop lying to me) Then I mention that the other guy was a farmer. Then I asked him if it was worth his families life, he then decided to charge the same amount all around for grain. I went to the inn and spoke to the guy there. He had an option in which I asked him if (and I paraphrase heavily here, but I believe it was the middle choice) if this was really all worth the trouble. There may have been a resolve check before that. I'm not sure. He decided it wasn't and said he would leave the miller alone. Like the OP, I thought this was a compromise ending to this quest. However, the quests is still open and I cannot turn it in. I also cannot initiate dialogue with any of the characters involved. They just display a sentence that basically says something akin to, "Leave me alone" or "I'm running out of grain" (again I'm paraphrasing heavily.)