Why surface has a bend outward and won't mirror

The side of the truck surface feature has a large bend inward/outward I would like to get rid of. How do I fix this issue the sketch is rather flat and doesn't contain guide curves that create dent should be flat or slightly curved at tip. Also, Solidworks won't mirror the side of the truck surface stating the surface is no longer in the model to create the mirror on the other side of the Front Plane.

SolidworksModeling And Assemblies