I would check in with support. Your first Power Meter snapshot in this series is similar to several other problematic solar setups I have seen on the forum (total usage influenced by solar). Example here:
It may be that your solar and battery combo (I assume that’s where your inverter shunts the extra solar when it is in “0” mode) confused your initial Sense install and calibration. Or it could be just one of those installs that didn’t quite go right. Looking at your second screenshot, it seems like your ECO worked, but it might have side effects downstream.
I would definitely pursue the support@sense.com team hard on this one, even if you have it working, albeit with the error messages. An if you do need to go through setup again, I would try to use the solar initially in pure production mode for the calibration step. I can see the zero mode potentially confusing the calibration setup.