Ah-ha! Dummy alert!!!! I was using a desktop version from January (without realizing it). Update does not update the app, just the charts. There should be at least an alert that the app version is out of date (or maybe I just didn't see it).
Anyway, downloaded the new version and insatlled (why is this not available from within the app?), deleted the existing RP waypoints and re-ran RP - voila! Perfect.