I saved a couple of water profiles I got from Ward Labs. When creating a new recipe I select my source water and set my target water to the same (since I don't want to add any salts). Then the Overall Water Report changes my HCO3 to 2.1 when it is 60 in my source water. What gives?

First of all, I’m a noobie. In the brew session, water requirements volumes look correct (it accounts for mash tun addition in strike water and mash tun loss while draining). But in the mash calculator tab it doesn’t account for this. See pics. I’ve set mash tun addition to 4qt and loss to 2qt...