Camper looks like its not level

well I'm not level inside I have a bubble it looks like the camper can be lifted in the back on the camper by putting a 1/2 inch board underneath it just to level out the nose on the overhead part to make it even and not look like the nose part is pointing to the sky, you also can not even see the marker lights on top of the nose cap when looking from the front so in another words your marker lights are facing the sky. Again the ford dealership says my truck bed rail sides are not tapered to where the tail gate is higher than front of the truck bed even the bubble level says its even, But the Lance dealer still insist that this is correct and it will look like your camper is leaning at the back end. My center of gravity is correct and I have a 1/2 stall pad for a camper mat for the truck bed