Looks can be deceiving; on my new trailer in my sig it "appears" to be very slightly nose-high when viewing from the side. Measurements from the frame down reveal it is actually very slightly lower in the front than in the rear. Optical illusion?
It may be an optical illusion. However, the OP needs to understand that it is OK to level the trailer in camp with a level. The only time a level can be used for the trailer to determine 'level' hitched to the truck is when the road is also level. Otherwise the best thing to do is level by measuring the frame front and rear to the ground and being parallel.