BIAB Mash water calculation

Hello all,

Just starting out with BeerSmith, after using the BIABrewer calculator for some time but am struggling with one aspect of the setup.
All of the figures for the equipment profile seem to tie in with those on the calculator, but the total mash water is coming up differently. Whats more, I can't change it if I have the 'full volume' box checked. However, unchecking it leaves a 'sparge' figure. Basically I'm lost. I know that the figures should match but I'm just not sure what to tweak...
Any guidance from other BIAB brewers out there?!

Hi,
  When you use a BIAB mash profile (or check the box) it forces the program into doing a full volume mash which is what most BIAB brewers do since there is no sparge step (you just pull the bag out).  That is why the volumes are so much higher for BIAB.

Brad