I drop cards a lot. I've hitting flourishes hard over the past 2 months or so, a lot of the cuts I learned in the beginning I hardly ever drop cards doing; but it does still happen sometimes. Sybil is one of the first cuts I learned and I dropped the packets a lot but now I hardly ever do and am shocked when I do.
Whenever you start a new cut you'll drop cards, that's just how it is. The more you practice the better it'll get and a time will come when you stop dropping them. I dropped a lot of cards when I started doing some of the cuts on Daniel Madisons new dvd and now I don't drop nearly as many.