The backup lines on my recently-sold Model S were very accurate. If I was centered in a parking spot, the backup lines were centered between the lines in the space. The lines on my Model X, on the other hand, are not. If I'm centered in the space, the left backup line is even with the painted line. The right side line is accurate. Is this the way the Model X is, or is something wrong with mine? Is there a way to calibrate the lines?