Think this is a bug, i just came out of the underdark and talked to the elves, and after talking to them my inventory keeps getting filled up with adamantine dust, even tho i didnt bring any drow items with me from the underdark, it keeps repeating itself, chucking all my items out of my inventory. Has this a known bug? or happened to anyone?

Have you patched your game with Baldurdash fixes and BioWare patches?
If not i recommend it. ;)