Oh hang on… your minsoc is set to 20%. This is a completely different issue.
So let’s start with the basics. The MPPT doesn’t care about the battery’s state of charge. It doesn’t even know what the state of charge is. It cares only about the voltage. If the battery voltage has reached the voltage the MPPT is aiming for, it will stop charging. It has to, otherwise bad things happen.
Conversely, the Multi will simply power the loads from the battery. As the battery starts discharging, the voltage drops a little, the MPPT will then wake up and start charging again, and the result is that the MPPTs and the loads sort of ends up in balance.
The battery voltage is the controlling parameter though.
It seems in your case, the Multi is not powering the loads. Completely different issue. I cannot see in that picture why it won’t do it. PM me the site id, and I’ll see if I can get around to it (though, you should be asking your installer this question 
).