That's great results. I've read that the hard calcium stones sink, the lighter cholesterol stones float. It is good that the sludge is breaking up. The putrid smell is from a type of bacteria and may be growing in the bile system. The Drs call this a near infection because the bacteria are usually not pathogens. It may help to use foods, herbs or meds to increase bile production, use different methods of dissolving hard stones and changing your diet so that your body is slightly alkaline rather than acid. See Acid ash or acid producing foods.