BBT chart?!

I just started tracking bbt, I didn't want to be one of those people but the clock is ticking before my hubby leaves. I want to know that we tried everything.
​But what on earth is going on here? 12/9 I had an actual temp of 39 for most of the day so that explain that one. But what's the up, down, up, down all about? Glow keeps telling me my temp says I'm ovulating.. I can't work it out! 
​Can anyone help!