&That was productive. It looks now as if the mains are correct. That said, I think the other circuits are still pretty much scrambled with respect to phase assignment and/or CT orientation. At a minimum I would expect the AC to read fairly close on all three phases. Not sure what the load is in the garage, but shouldn’t be reversed and the PF on 1 and 3 are questionable.
One thing that the light experiment shows is that voltage on the three phases is probably not as consistent across the three phases as some other derived reference installations. That is probably why the light is 120/131/139 watts across the three phases. If you want greater accuracy you may want to consider using direct reference after you get the other unit.
In the meantime, you will need to somehow determine the phase for the branches that you have. Can you get a picture of the back of the board where they all connect? Specifically, I’m interested in what’s going on behind this: