Power Meter Entity Type Help

Hi all,
I live in a weird house that has 2 power meters.
One is new (a smart meter for my house in HA) and the other one is really old in my garage (so i used a Tuya CT clamp power monitor to get it into HA).

They work great in HA by themselves.

What I want to do is combine them into a single virtual entity, so I can see my real-time usage.
So I created a Helper group with the following settings:


It works… Kinda!

Except all I get is a number instead of it being detected as a Kw reading.
Meaning when I click the entity I see bunch of numbers instead of a graph of usage:

Can anyone advise on how to fix this please?

Thanks!