Jamkash Vehicleades Kashmir — variation in bill

I purchased alto k10 (Ags) two days back on 14/12/2017. The amount that i paid through cheque was 2, 26, 984 and 2, 00, 000. Because they asked to us to pay through two cheques. The bill that they provided us has the amount written as 2, 12, 984 and 2, 00, 000. So i paid a total amount of 4, 26, 985 plus 5000 cash and the invoice is showing the amount mentioned as 4, 12, 984. I went to jamkash today but i was not satisfied with their answer. What is the point of submitting the cheque of amount 4, 26, 984 when you are showing bill as 4, 12, 984. This is not the first time i am purchasing a car.