As I recall, when you call up a User Voice, even though it calls up the proper one, it still shows the name of the factory voice. I think this is true of the organ flutes also.
Regarding the split point, there is a box in the registration "Save" menu where you can save it to registration, or disregard it.
The parameter IS global, unless you save it to registration.
You can get plenty of information at
www.psrtutorial.com DonM