Audio output display puzzle

I use an HX3 organ module and the outputs are connected to the two Steinberg UR22 interface jack inputs. I created two input ports in Cantabile (L and R) and they are sent directly to two output ports (L and R). I can see the input levels on each port ok but the Master output indicator of Cantabile shows only the upper bar moving. At the speakers I have output on both. When I play e.g. an electric piano vst in Cantabile I see both output indicators working fine.

Am I routing the HX3 inputs correctly (see screenshots - only one port image as the other is identical)? Should I be using a stereo input port configuration and not two mono ports? Any help welcome as always.


(Just noticed that the output ports say Behringer not Steinberg - must change that!)