I would imagine people arguing about the definition of the word penultimate wasn't really the point. "Penultimate' has been given that vibe in modern language because we see the end as the ultimate, and the penultimate as the closest thing to ultimate. Ultimate in that case meaning our version of ultimate, as in definitive or 'greatest' or whatever.
When you google penultimate you get lots of "The Penultimate Ranma Fanfic Index" or the "PenUltimate Digital Type Foundry", or "Richard Weld's Penultimate CCG Review Page." None of those mean "next to last", or at least they don't appear to. So, it seems obvious that in our vernacular penultimate isn't limited to "next to last".
So, the argument here seems to me akin to someone stopping you in a political discussion and complaining that you used a double-negative, even when it was obvious what you were saying. If I say "They ain't got no business doing that" you know exactly what I mean, and if you choose to nitpick you are just choosing to nitpick instead of addressing the point.
I can see why they were deleted, but I would have probably just bitched and said if it continued I'd clean house. Not my blog, though, so being their blog, it is their button to push.