Is it normal for BM to float?

Recently I noticed that my BM's are floating, just like the green stones after a flush. After my last flush, I also noticed some film of oil floating on the water in the toiled after. Is it because of all the oil? Aside from the liver flushes, I also take one to two Tbs. of olive oil and or Udo's choice oil daily. I thought this is good. But perhaps too much for me?
Would appreciate your thoughts on this, thanks.