While they are not exactly the same and your graphics have not been "stolen" and reused, it is obvious that the designer of the 2nd site has copied the general look and structure of the first. The logos are very similar, the colour schemes, structure and layout, and the double footer section too. CBG, theres not much you can do about it I am afraid, apart from publicly shame the copiers for their lameness and lack of originality. Take it as a compliment, this "big affiliate" was so impressed by your site they got worried and copied it. They *did* copy the first site and changed it "enough", its obvious. I hope you didn't pay a lot for the design. Why don't you post the name of your design company, so we can all be sure not to use them in future?