Beersmith is telling me to add too much water

I need help figuring out where I need to configure Beersmith for my environment.  I created a recipe for a 5 gallon batch and I use a 5 gallon Igloo cooler.  I set that all up using the equipment option.  My recipe calls for ~14lbs of grain.  The mash in and mash out water additions are too high.  If I followed the 17.5qts mash in and 9.5qts mash out water there is no way I could fit all that in my little 5 gallon cooler.

Hi,
  Yes, you can only fit about 13 lbs of grain in a 5 gal cooler and even that is a tight fit.  Unfortunately the current version does not check that automatically.

Cheers,
Brad