Rae, I used to think I was long-waisted, too. And I also thought I had short legs. Well, that proportion exercise taught me that it's a whole lot more complicated. First of all, my HEAD is big!! Weirdly big!! And that sort of skews the other proportions a bit, because you measure by your head length.
So then I learned that I was slightly long from chin to bust. (Not really a surprise). The big surprise was the discovery that I am actually SHORT-WAISTED.
DUH!!! Now I understood why petites dresses and jackets sometimes fit me better. Not always --- sometimes a regular is better for me. But I'd had that experience often enough, especially with American retailers like BR (that tend to size on the large side) for me to wonder about it.
The next part made more sense: I am slightly long in the rise. Okay - so that explains why I felt like I had a long torso.
I also thought I was "short-legged" but it turns out the torso and legs are in proportion. What I am is short in the CALF. And that in turn creates the appearance of overall short legs, especially in conjunction with a long rise.
I don't think this is true of you. Your calves look longer than mine, you lucky thing. But I guess you get the point -- there are a bunch of variables here at play.