Yes that's an offset.... quite a normal offset. What does your "normal" offset look like?

Hmm...well the (apparently not) normal one appeared very close to the corm as a seperate unit that readily untangled from the roots without any obvious, thick, ropey structure attached. I got only one offset last year that appeared in the same manner as that one. But I'm now guessing it just happened that the attaching root/runner structure had dried out prior to being dug up? Thanks for the help.

Yes they sometimes dry out and separate on their own. Other times they have to be cut

Gotcha! Thanks for clearing that up chicago311(5). Do I cut it off then, or just allow it to dry and fall off without assistance?

It doesn't matter, it will grow either way

My experience with working with these plants over the years is that they are the epitome of strange - definitely any "growths" off the side, bottom, wherever, are offsets. I was given a small Konjac this year, didn't grow too much this year, and I just dug it today - there indeed was a small offset sticking up and out, looked to me like a gourd actually! Of course, on the other hand, the sauromatum venosum has grown from the size of a cherry to a grapefruit, with a bunch of offsets all over :-)