Cameras do not overexpose, photographers do. Once the photographer has adjusted to the behavior of the light meter, then he or she can make proper exposures as long as the knowledge is there. If your images are overexposed then you need to do some study on how to get proper exposures. There are many books written on the subject so I won't try to write one here.
Exposure is not an automatic thing. Automatic camera features should be an aid to getting good exposures. They should not be a substitute for knowledge and thinking.
I use a D80. I get proper exposures. I never bracket and never have - even in the film days when I had to wait for processing to see the images.