C-Map charts for North America, lack color and hard to read

I purchased C-Map charts for North America, so I could use Coastal Explorer in the Bahamas. I am disappointed in the quality of the charts. They are wrong in many areas, and lack the color gradients and clarity that used to be in the Bahamas raster charts. I downloaded Aquamaps to use, which has nice charts for my android, that I have to use as a supplement, due to the difficulty in reading the C-map charts, and the errors. Am I doing something wrong - Anyone else have the issue with the C-map charts for Bahamas?