I’m glad to see this one resolved.
It’s alternating current, so even though you may conceptualize the power flow into your house, and think the arrow on the CT should agree with that, the current is alternating evenly in both directions. It is only when you observe it relative to the voltage reference that it takes on the characteristic of power flow in one direction or the other, depending whether the current is in phase with the voltage or opposite.
Your Aussie plugs are polarized, and that’s great, but the plug on the US VT and the Euro VT are not. If you were using one of those VTs and reversed it in the socket, it would have the effect of reversing all your CTs.
So it’s all relative. To complicate it further, there is no standard for how the polarity of the plug should relate to the barrel and pin of the plug (which is a DC plug). I have a sample of each of the Aussie VTs that I recommend - AC910 and MP3027 - are exactly opposite. In other words, your CTs will point in one direction with one and the opposite with the other. In the US or Europe, you can just reverse the VT in the socket. You could have simply checked reverse for your VT.
There is likewise no standard for the how the CTs should be wired to the 3.5mm jack. The YHDC and Echun work one way, and the AccuCTs work the opposite.
So that’s why the procedure that I referenced says:
Complicated as the above explanation is, it’s as simple as that.