Subspecies IDs don’t “move the ID forward” until there are two of them, which is why this one https://www.inaturalist.org/observations/39902448 is still labeled at subphylum.
There’s an open feature request to address this issue: https://forum.inaturalist.org/t/leading-subspecies-ids-should-change-the-obs-taxon-like-leading-ids-of-other-ranks/139