...and rebooted. Still have Windows Share Volume 1 and 2.
Make a choice (Volume1) and media on only Volume 1 is displayed, back (..) chose Volume 2 and media on only Volume 2 is displayed.
I am not overly worried about how files are sorted: Recently Used, Filename, Title, Performer, Genre, Director, etc.
(Presently - Sort is Filename, Genre is all, Type is all, Sources is Hard Drives-Discs & Jukeboxes-User=Public)