Maybe you are very lucky. Myself I have been farming CT for 17 months and counting the breaks in service I have on the server I am at an average of 3 kills a month.
Maybe it does drop, that really wasnt what I was saying. It appeared to be a really really low drop rate but its not on a seperate loot table like the DSK rare's.
Well its 100percent chance to drop 2 items but each item can have its own percent chance to drop. Hench why Lady M likes to never drop the orb and on super rare days when all the planets align she will drop 2.