Has anyone had troubles recently creating multiple walk cycles, triggered by mutiple path constraints in different Choreography Actions?

I'm in the middle of a project where I have a character taking tiny steps on one path early in the animation, then he does some other stuff, then takes big steps on a different path. The little steps and big steps are both Actions, and each path constraint is in its own Choreography Action.

It seemed to work OK, but now I've found that, bizarrely, the Chor Ranges of the walk cycles don't seem to "stick"; I can type them in, but only one of the cycles has any effect (in fact, only one of the cycles has a red bar in the Timeline, the other one doesn't appear at all, despite the legal Chor Range).

I've already sent my project file to Hash, but I thought I might open it up to my Reusable Motion pals... any idears?

Yes yes! There seems to be some sort of glitch in actions interacting. I've also sent a project in. I think they're on the case.