You are following a similar pattern to my early flushes. Every one was different. My third was the most productive with lots of bright green larger stones. But the first 6 flushes in particular were all very different. My fourth was lack luster. In fact, I wondered if I had screwed up somehow, as I couldn't believe that I was done with stones that soon. As it turned out, it took 30 flushes before I was stone free.
The liver pushes stones out from three different sections in the liver. But, only one section flushes each time. That is why they say that you have to have 3 flushes in a row without stones to know that you are stone free. Sometimes one section is more congested than another. That may account for why no two flushes are alike. Just keep pushing ahead and doing the flushes. I watched my health in general gradually improve over the 30 flushes.