The short answer to your question is that the difference will never be noticed in flight. However, if it bothers you, first get the fuselage level. It appears to be a stick of some sort with a flat top across the fuselage so it should be easy enough to get level. Then measure the space from the floor to the wing tips and see how close they are. It could be as simple as one leg of the main gear just a bit longer than the other and projected out to the wing tips, the distance gets greater. Get the fuse level, then check the wing tips.