Thurg armour turn in giving wrong class gear.
 

1:40 pm PST turned in the correct corroded pieces and gems and received warrior gear instead of shadow knight gear. ~ Kingcong is the name in game thanks !

Bit more info would help I'm sure. Different quest turn in mobs for each class should prevent this from happening unless there is a actual unreported bug. Which item/gems did you turn in to which quest giver? Maybe someone will have a answer for yah :)

probably turned it into the warrior npc instead of the sk npc?

Agreed - that is more then likely the answer to the problem. I personally always like to tab out to the wiki and double check each turn in just incase. It's a sad day when items get eaten because of this :(

Any confirmation on what the problem was OP? Just out of curiosity. Perhaps it will help other's if confirmed a bug or at the least remind other's to double check turn in mob/items :)