Make sure it is really 24" to the receiver.
The long rear overhangs make the measurement deceptive. I have a barely perceptible slope on my driveway, but when I measure the height of the hitch in the drive, it measures 6" higher than it measures on level ground. Based on my measurement in the driveway, I put on a 2-inch drop to get "level" with the baseplate of my truck, only to eventually discover that the truck was 1 to 1 1/2 inches high on the road, which was causing me handling problems when braking in turns.
Towbar should never be high at the towed vehicle end, for handling, even if the towbar manufacturer allows it. You don't want the towed vehicle lifting its end of the towbar.