I do not think you understood what I was saying. Look at...
http://eq.magelo.com/npc/7155
See the spider shows it drops silk 85% of the time? What the emulator would translate that to is dropping 1 silk 85% of the time. I am not sure how the Magelo import routine works but I would think it could possibly get the percentages right on multiples. A Crag spider can possibly drop up to 8 silks. It may be 15% with an 8x multiplier, but it is possible.