When you wrote
Double pinning ..... is an older version of the term pinning, which refers to any automated way of creating curve control points
(in "ctrl-z and curve rotation" reply #1)
realisation suddenly dawned for me. I'd been very confused about the term pinning up to that point, and had the sense of really not understanding curvemeister.
So I've been wondering if it might help people learn more easily to distinguish explicitly between the older, more general use of the term pin, and the newer, more specific? As the pins you find in the pin-pane at the bottom of the screen attract the curve to them, perhaps a term like "magnetic pin" would help? Or even just labelling the pin-pane "Color Pins" to explicitly distinguish them from "normal pins"? Perhaps my mistake came from the fact that only "color pins" have the pin icon?
(As I write this I realise I'm still learning, so not sure, but perhaps sharing the fruit of my confusion will help you help others learn more easily?)