Please post a screenshot of your preset in Midihub Editor (please include entire window in the screenshot) and Ableton’s MIDI preferences section with Midihub ports visible.
In another case of the RTFM syndrome, I was finally able to make it work.
Created USB A-D tracks and mapped each against a MIDI A-D tracks. It worked once I realized USB A could not be virtualized across each of the MIDI outs.
I realized I was using an incompatible MIDI TRS adapter for one of my devices and thus not working.
Thank you for your patience and your prompt response. Much appreciate it.