[Therion] Breaking a loop at a specific station on extended elevation

[Bruce Mutton]

>but now I am wondering ... if they are supposed to take place for "the leg that reaches this station, and every leg after it".
... o_O

Pretty sure this is the way it is.  Which is why I tend to use extend <leg> rather than with a single <station>.  It is more easily understood six months later when you try to figure out what is going on. But there is good reason to use extend with <station> as well - auto propagation of the extend direction.
Extend <station> in Therion is the same as the way PocketTopo implements 'flip' (equivalent to Therion's 'extend').  Except that with PocketTopo you do it interactively in the graphic view, and with Therion textually.

Bruce