That's alright. I beat the game on Hard difficulty and it awarded my the ability to play Crushing, the medals for it, etc but DIDN'T give me the trophy.
The trophies in this game are farked up and I somehow doubt that ND or Sony will do anything about it
I have the platinum and I didn't experience any glitches...sorry for your luck
Current Games: Sacred 2, Demon Souls, Blazblue CS, and Fable 3