I elected to pay the Miller instead of finding the Ring from the Executioner, But the mission is still active. I dug the grave and every chest on that property and even knockout/pickpocket the Executioner and there is No Ring. Do I miss out on any cool missions, I forget it has been so long. Money is definitely not a problem. But I would like to solve the problem, I cannot go back to far.
I have the same problem. See if all you can find the treasure chests most of mine are empty.
Talk to Peshek again. He should ask you if you still want to do the job. If you say no again the quest should end.