Lots of people think that the Andreas Moritz statement "your liver/gb is clean when there aren't stones after 2 consecutive flushes" is not true. Andreas Moritz was human and hence not perfect.
Considering that the vast majority of the stones are made by the process itself, it would be strange that stones cease to come out.
The important question here is : Do you and your friend feel better after those 12-14 flushes ?