As far as I understand it, a lap in which you failed the sign run doesn't count for your 250 total. Did you check your total lap count before and after a "failed" lap? One failed lap doesn't reset your total lap count, it just doesn't count as a perfect lap. I couldn't check this myself, because I don't fail. Possible. I didn't check, and it may be true. I can all but confirm it for failures in the advanced Barbarian course, so it should be the same. However, I had been hearing people insist that it must be 250 *consecutive* laps, which praise Jagex is NOT true.