They did give me points for a trip from SIN to CPH because of their broken milage calculator, out of "good-will" (that comment made me even more upset), so you can try your luck with the same reason if it doesn't credit 15% extra.
I'll obtain silver next month, and will make another booking before tomorrow, which the milage calculator will also show as giving 15% extra when I turn silver, but I guess this makes my chances even smaller of getting 15% extra points for that booking :P