Hi Brian,
the easiest way would be to leave the Style file untouched, and simply save all your changes in
Registrations.
The global Style volume cannot be saved directly into the Style data. You must use a
Registration to save or change the global Style volume (shown in the Balance display).
If you make changes to the Style Parts in the Mixing Console, you finally have to open the Style Creator and press "Save" there. Also for to save a new TEMPO directly to a Style you must use the Style Creator. (Just re-saving a Style in the Style Selection display will NOT do the job.)
I recommend to use the FIRST method, so just work with Registrations.
Best regards,
Chris