I have not started flushing, but plan to. The first thought came to mind. What if the formation of chunks of olive oil is flushing other (real) stones and impurity out. Others have said that they had things show up in an ultra sound, then after the flush, it was gone.
Also, I know that if I digest beets or beet juice, my stools come out with red stuff resembling blood in the stool. Why didn't the test using beet juice work?
Finally, there are many who do flush and after several atempts get out fewer and fewer stones.
I think I will still go ahead and start flushing soon. But that would explain why so many are always getting stones out.