I think you need to wait 2 weeks til your next flush....I did my first and was as excited as you were and did another 1 week later and saw no stonesin that second flush...although I filled the bowl with what resembled a gallon of thick green pea soup...so I waited the full 2 weeks til my 3rd and got a great flush with easily 2oo stones and 1 big robins egg size stone.
As to the OO (Olive-Oil) mix...I don't have a problem with it.....I bought a plastic drink cup with a lid and I mix things up and shake aggressively....it mixes up well with the fresh grapefruit juice and goes down easily.