No, I only selected Queen because there were three albums, and the presentations from Neutron were the same for two and different for one. And I know I had "accidentally" stumbled into modifying things somehow and couldn't get back there to sort things out which still weren't working properly.
In fact the same issues were present for all other artists, which I hadn't made any specific modifications for.
It really was just my unfamiliarity with the user interface, and the "long press" way of drilling down (as opposed to the usual right-click).
Anyway, I'm much more educated now. And again, the key sort sequence settings value to enable (for me, anyways) is "folder/filename".
I'm happy now. Thank you for your help.