PapaDooki

So just started workinhg with bee's and took a skep to a wild hive and let it swarm. good deal now i have captive bee's. build a fenced in area filled it with flowers and have sticks to put skeps on. Straw dummies in the corners to distract angry bee's. so far so good. toss in more skeps and bees all migrate around wonderful. Fast forward a few days and i been doing some work expanding my farm and a trip away to mine and come back and all hives now have orange doors. sweet broke half of them. collected more reeds and replaced them all. Issues start here. the remaining hives are all ready to harvest. no matter what i do they won't swarm so no new bee's. if for some reason i miss swapping skeps and they all go ready to harvest they won't swarm. it's so annoying that my bee's are refusing to swarm. i had one with 120 flowers in range and 8 skeps in range. wouldn't swarm

So the current world i'm playing on i finally tracked down a ultra high deposit of casserite, my question is though the number besides it say 0.02%. does that mean that for every 1000 blocks only 2 will be casserite like it seems to be saying ?