Ok.. The different numbers in lye. I'm assuming you're using thesage's lye calc, and that one has variables for lye. Most crafters the 5% excess fat lye amount. This means, the 5% column has enough lye in it to transform (saponify) 95% of the oils to soap, leaving 5% unsaponified for moisture. Having a 10% superfatted batch can leave too many oils in the batch, causing it to go rancid quickly, and 0% superfat will strip your skin raw! Angied.. Please read this section of the forums, as I'm sure it will help answer many of your questions! Also, check out www.millersoap.com, and know it backwards, forwards, and inside out (or at least know where to go when you need a reference.) http://www.candletech.com/forums/forumdisplay.php?f=27 HTH ya'll!