My pointer often has two positions lighted. Sometimes the car will not start while it is what I think is PARK, but when shifted to neutral it does turn over and start. In addition, the battery will be dead if the car is left for several days without use. I am sure that in those instances the gear shift did not get fully into the PARK position. What should I look for to correct this problem? Also the odometer displays jibberish not mileage.