Phil,
I could
not reproduce that. I learned ACT controls for plugins from 3 different brands (IK, Line6, NI) and shut down Sonar without saving anything. Next time I used these plugs, ACT mapping was right there, same as previously set.
Mind you, I had some difficulties that I could not ACT learn one of the older IK plugs and Amplitube.
NI Guitar Rig didn't show turning faders on the GUI when turning rotaries on the VS-700, but after the Sonar restart, ACT settings were still there and all GUI knobs moved in sync with VS-700 rotaries.