I bedded them in as per instructions, but I think you are correct in saying the track work was a littile harsh for street pads, maybe I should have fitted harder pads for the day. I don't get any negative feedback when braking so I assume (bad choice of a word!) they will clean up in time, but I will give them a light skim anyway.
Brake fluid is also in question, I think the problem is a combination of the above two factors.
Change the fluid, harder pads and give it another go go go!!