Water Calculator

Hey guys,
I’m using the water calculator on Brewer’s friend, and have really learned a lot whilst tinkering around.
I have one question that is puzzling me:  If I check the box that says “Salts added to Mash only”, I need to use nearly 3 times as much salts than if I don’t check that box (If I were to salt my sparge water).  The reason why I’m asking is that I want my salts to go into the mash, as I don’t want to raise the PH of my sparge water… but it seems counter-intuitive to triple the amount of salts if I just salt the Mash.  I’m hoping that one of the water guys sees this post…

Can you post your water content and salt additions?