seems like adding a conformation dialogue "ya rly wanna lewt that blood dawg ?" was too hard for blizzard.
also the blood cant be traded like other dungeon loot (according to our retardin who instantly braindead lootet festergut)
so now i'm sitting with 25 saronite, LV and rotface's blood in dalaran, waiting for a gm fixing the problem.
(well and qq'ing here) :'(