ha..
Yeah, that math got me confused as well and personally, I don't think is right... just multiply your lye of 6.14 times (67/33= 2.03).. so in your case, lye is 6.14 x 2.03 (NOT 2) = 12.46oz of water.
so yeah.. it's not that 33% lye equals to lye times 2... it's more like Lye times 2.03...