Will do.
I have discovered the reason why. When you create a flick switch using supercontrols, as it switches one off and the other on, it sends both buttons of data (kind of what you would expect for a toggle but A toggle is the only way to keep the LED's lit up on your selection). It must be this that makes my hardware glitch and not select. Simple instructions to see and hopefully I am missing something!
1. Create 2 buttons. A and B. Both Toggle
2. Make each Sysex and in the bytes section a simple line separate of numbers . Note that each sends the same data for 'on' and 'off'
4. Make a knob, make it a Supercontrol with each button as a Subcontrol and switch between A and B using only the buttons.
I get both buttons transmitted at the same time when switching. If there is some sort of timing issue, I suppose this could allow the previous value to remain on the Hardware Synth.