Using my 1 time use rank 11 missions awards me with nothing, there is no cast bar associated with the activation of the item. It jsut eats it and vanishes. Its happened to me over7 times with all different various one time use rank 11 mission items. ***.

I'm sure you did and i am in no way implying anything, but did you scroll down the bottom of the mission list? thats where they show up. And make sure that you are in the crew skill. I had gotten one for Discovery thinking it was for another crew skill and didnt find it until two days later...by accident.