So after further conversation it does look like Heater bypasses were installed.
@ajw22 Does this look accurate that it would be the 2 valves circled in this screenshot?
Here was the response:
“I have always plumbed heaters and heat pumps with bypass because it’s also recommended by manufacture specially to a heat pump. The by pass it will allowed to control the flow going to a heat pump or to be able to turn one or the other. With the long of a run for your spa you will probably need to run your pump at the higher RPM which I think you can pull up to 120 GPM the capacity for the heater I think is 90 GPM and the heat pump is lower capacity. The whole logic of having a by pass it’s to help the water flow specially for your jets by cracking up the valves so not 100% of flow goes trough your units ,If we plumb everything in series it’s possible to blow out the internals on your heat pump. It happened before and it was blamed on no bypass installed.