[Siege of Cragholdt - Killed Concelhaut Without Dialog]

Hi. I killed Concelhaut by initiating combat with him before he said anything to me. Now my quest won't update and I'm far ahead of that point of the game. Is the quest unable to be completed now and did I bug it out? Thanks.

[Bugged Belt in WMII: Arthrek(Arthek/Athrek)'s Cord]

There's an item found in the Ondrite temple called Arthek's cord, which provides +1.8 move speed and +21 Interrupt while above 75% Endurance. However, it only provides +1 Interrupt when worn. Sucks because I want to use it on my super speed Monk.

This is an obvious bug. How do I go about editing the file to make the item what it's supposed to be?

Edit: It's also spelled differently in every instance it is used.