Macro adjustments not affecting past days. (would help with Lumen goals)

I am trying out the Lumen metabolism measurement device, and every morning after it reads my breath it gives me my daily macros. I use these numbers to adjust my CRONOMETER settings, but I don't like how that then changes my past days as well. For example, LUMEN assigned me a HIGH CARB day today, so that number (270g) now shows as the goal for all my past days (where it might have been 60g when I set it). It seems like it should default to just changing current and future days, not past days.

FYI, not sure what to think of the Lumen. Seemed like it must be BS, but I have to say I'm liking it and it is working for me so far.