Why are the simulation symbols not distributed evenly on the surface of my thermal study part? If I chose interactions that are suppose to be uniform across that surface, why are the symbols not uniform? What do they indicate?

Why are the simulation symbols not distributed evenly on the surface of my thermal study part? If I chose interactions that are suppose to be uniform across that surface, why are the symbols not uniform? What do they indicate? Thanks for the help!

SolidworksSimulation