In Rebirth Info the text says “Total Level = Levels + MIN Levels”. Why is “Levels” plural there? What other levels do you mean here? From Stats Info tab, I can see there are also singularity levels, do you mean these? Or is it just incorrect usage of plural “levels” instead of singular “level”? The game also doesn’t explain to which stat Rebirth’s Cap refers to. Is it “Level”, “Levels”, or “Total Level”?
It might be more clear if it were singular, Total Level referring to one thing with a value of x. As is, you could argue that if your level is x, then you have x levels, so either work technically. I know some people were helping clear up translations, but I don't know if they kept doing it or only pointed out what they found at the time. The dev is open to help in that regard.
The info page for Rebirth tells you all about it.