If you ask wether I ever stopped passing stones - the answer is yes. There were flushes with no result, still I felt better after.
But the stones keep forming in our liver, so I drink the mixtures as prescribed every few months, when feel a little discomfort. I can feel when my liver has stones. It is not very obvious, but I can feel when it is time for the next flush.
The answer to your second question is yes. I have eliminated all my stones after 4 flushes, each done with two weeks interval. Some people here needed much more to get their first no stone flush.
After my fourth flush I flushed again after one month, nothing came out. So I decided to make two month break next time and that was right decision. As for now I follow my body needs. It tells me it is time for another flush, so I flush (my 11th flush)tonight despite my 5 month pregnancy, and invite you to join me.