I added a Diacetyl Rest in my brew log. The Brix calculator converted my 10.8 reading to SG-1.043. When I add a Sample to the brew log of the same 10.8 reading I get a SG-1.020 conversion. I used the Refractometer Calculator to confine my readings. If I enter 10.8 under Part I: OG Brix WRI...