Hello all. I'm a beginner trying to setup my equipment profile. So far I've only worked with extracts and use a 15 gal kettle for my 5 gal batches. As seen in the below picture, I usually put about 6.75 gal of water into the kettle, and end up with close to 5 gal of wort into the fermentation bucket. Shouldn't my "Post Boil Vol" be 5 gal? I'm sure its me and not the software, so any advice is appreciated!