steering question
 

well i have a 98 xj stock it has a werid steering thing, when the steering wheel is dead center the car pulls to the right but if the wheel is slightly and i mean slightly to the left from dead center position it steers straight, i've had my steering alingment done and my tires balanced. still the problem persists. my dead spot is gone but it still doesn't steer straight. Im going to take a it back to the place that did the alignment and see if they can swap my front tires to opposite sides to help the jeep fight the right side pull? well any input or ideas from anybody