Muse direct graphs seem wrong

Just got my muse and been messing around with it. I don’t understand the graphs though. It seems to me that the reported Delta line is what I would expect Beta to be.

From looking through the forum this seems common but I don’t see any answers about what to do with is.

I.e. Delta is really high. And when I close my eyes that Delta chart moves down, allowing the Alpha line to take precedence. And then when I open my eyes again Delta shoots to the top of the Pops. Is this right?

Any ideas about how yo adjust the readings