Can't understand the Tesla app

We had 25 400w panels installed with a PowerWall 3 about a month ago.

I don't understand the app. It shows we generated 50kwh but only used 1 (seems too low) and exported 49 to the grid. But reading the Duke meter each night at midnight shows that we are using some power (which I don't understand given the PW) and exported some energy (but not close to 49kwh).

The installer came by and moved the CTs, but the issue remains.

Am I reading something incorrectly?