Not sure which instructions you followed. Folks have had success with these newer simplified instructions.
You have only one AC reference transformer, so you are using derived reference. The IoTaWatt comes with a VT configured, but it is a North America VT and calibrated to 120V. You must change the model to match your 230V unit - Ideal 77DE-06-09(EU)``. When you do that, you should see a more realistic voltage for South Africa.
Once you establish the correct voltage, you should follow the instructions above. Concentrate on getting the mains correct first, as that will identify the phase assignments for the branch circuit CTs.
If you get stuck. I’ll need good pictures of your panel showing the mains CTs installed, a screenshot of your inputs setup display, and a screenshot of your status display.
From the status display that you posted, the phase assignment for Phase_1_A cannot be right with a power factor of .30. I’m thinking that phase should be in the neighborhood of 700Watts.