Avator,
This question about the origin of the "soft" stones gets debated all of the time on the curezone liverflush debate forum. My personal opinion is that they are created during the flush, probably by the bile being expelled. Some people have dyed their olive oil various colors and have seen these colors within the stones. Ultimately the question of the stones is not as important as the question of the health benefits of the flush. If you see good health benefits from the flush then keep at it.