Interesting. I decided to do this with my setup. I joined 2 circuits into one and all seemed good so I decided to try it with a couple more. One of those circuits (floor heating,breakers image below) already had one CT on it (2 black wire from the right) and I doubled in IotaWatt. When I include the other black (on the right, outlets in same room) I got the reverse icon on the status page. I rechecked the CT and it was installed correctly.
Instead of using the 2nd black wire I tried joining the white along with the far right black. Same issue/icon. I then removed the white leaving only the far right black wire. Same issue/icon. No idea why this circuit appears “reversed”. Anyway…
I then connected the two wires but I looped the far right so it came in from the bottom(like the instructions for installing 1 ct with double breaker) while the 2nd from right as normal), coming in from top. Do you think this will work ok?