It seems the reason the Capcom ZN1 games and BIOS will not show in the list at all is somehow related to the undumped upd78081.655 rom. I was only able to discover this by removing the qsound device and loading a ZN1 game from 'All Games' even though it shows as unavailable and audits as "NOT FOUND". This was the only way to get MAMEUI to display missing info.
So again, what is wrong with the auditing feature that it no longer lists missing/old roms?