I think Universal did it somewhat better on that score when it came to the releases of shows like Emergency!-- the releases were Season One, Season Two, etc., all the way through Season Six, and then the final set (of the later TV movies) was called The Final Rescues.
As with other shows that have had truncated first gos and longer second gos, like The Complete First and Second Seasons of T.J. Hooker from Sony and later Mill Creek, or Seasons One and Two on Moonlighting from Anchor Bay/Lionsgate.
I guess then, from what you're saying, that you're going by how Barbara Curran put it, and that the final go (1990-91) was the 13th one, and not the 14th.
Quincy, M.E. is of course not the only series so treated in its DVD releases-- O-R CBS Lorimar Dallas has also been so treated (Warner Bros. thinks the 5-episode April 1978 miniseries is an actual season in itself, and that the first proper go [1978-79] is really the second go, the second go...