We'll, I've searched and read all I could find on the subject and then implemented each suggestion. With all of that effort and trail and error, I still have an offset of about 1/32nd inch. Since it is the bottom casework of a secretary, I think I'll go forward with the dovetails as where they meet with the other sections the intersections will be covered with molding.
If anyone has any other suggestions besides checking concentricity of the bushing/bit, the squareness of the stock, or cleaning the area around the stops,,,,I'm all ears! By the way, I'm cutting halfblind dovetails with a D4R. Thanks as always!