Decoction Mash Volume Bug?

I was working on a recipe using the double decoction mash profile as a template.

It appears that BS adds the decoction volume to the water volume when calculating sparge water.

I am not sure if this is a bug, or something that I am doing wrong.

I started with a 2qt/lb water to grist ratio. After my decoctions, the software is telling me I need -16 gal of sparge water 

Hi,
  I believe if you don't add water to a step it works with the existing water.

  If that is not the case let me know as its possible a bug exists.  Send me a recipe if you have a specific case of the problem.

Brad

Sorry I have been a bit busy and am just now getting back to this.

If I try to edit a decoction step, the water to add says -0.01. If I try to change it, it goes right back to -0.01