The lower one (the cut in the main plane) is made on purpose (the lower left arrow). the plane aint ment to be totaly flat. There is a slight bulge in the plane.
Also the base ring of the hatch (upper arrow) cuts the light. a simple method to add depth to cubical models using nm.

but if someone doesnt like it, they can just remove the edge by painting the neutral blue onto it and remove the ring mapping.

cheers and have a nice one