Thanks for the pointers, R0J0hound. My logic was indeed out of whack.
These two threads helped (one featuring an excellent example by you, R0J0hound, and another old one by lucid which includes an exe, and is a bit more flexible):
about-the-new-interpolations_p787879
what-are-lerp-qarp-and-cubic-for-the-nonmath_t64198
This what I've got so far:
capx: https://www.dropbox.com/s/vt7frvz41a19y ... .capx?dl=0
web preview: http://unknownenterprises.altervista.or ... index.html
With this approach I can have an arbitrary number of paths, nodes in a path, and followers on those paths.
Unfortunately, in the editor, it looks more like my layout sprouted warts. <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">
Damn, it would be nice if C2 had path objects...