I've moved the thread to the Yamaha subforum, as Fred suggested.
There are two possibilities that come to mind:
(1) When you are
saving the registrations, you need to be sure that the STYLE button is active (lit up) so all of the style-related settings will be saved. (Alternatively, if you want to save the pattern-related or song-related settings rather than the style-related settings, be sure the PATTERN or SONG button is active when saving registrations.)
(2) If I'm not mistaken, you also need to have the STYLE button selected when
recalling the registrations-- or, at the very least, don't have the SONG or PATTERN button selected (but the VOICE button might be okay)-- otherwise I don't think the style-related settings will be restored. Of course, you need to have saved the style-related settings, since you can't recall any settings that you didn't save-- for instance, you can't save song-related settings to a registration, then expect to recall style-related settings with that registration.