So i got a transmog scroll on my warlock and bought some classic pvp shoulder and transmoged it. I have 2/5 t9 but now i see it like its different items and i am not sure if the set is working still or its just visual bug.
http://prntscr.com/d094gu this is my chest piece (not transmogged)
http://prntscr.com/d094oe this is my shoulder piece which is transmogged
Since its hard to test it out if i could get an answer from staff it would be perfect.