Help me understand my temperature profile

I have had my ecobee for most of one cooling season, and only in the last few weeks have I had any heat use (Chicago suburbs). I have a 2 stage heat and cool geothermal heat pump, plus electric resistance auxillary heat (that I hope to rarely use).

Despite little data, the heat profile looks as I’d expect, but what’s up with the cooling? The slope is going the wrong way and the raw data is all over the place.