BP must keep paying certain types of oil spill compensation in much larger amounts and to more parties than it was expecting, according to a court ruling which could add billions to its final bill….BP said it would appeal the ruling, which upheld the payout administrator's interpretation of the settlement, and which has resulted in more and larger payouts than BP had expected.… BP said even if it wins its appeal, its final bill for this type of compensation will be much higher, because claims not yet received or processed are not reflected in its current estimate, and because the average payments per claim determined so far are higher than anticipated. "If BP is not successful in its challenge to the court's ruling, a further significant increase to the total estimated cost of the Settlements will be required," it said...