So many of these sorting ‘issues’ can be so easily bypassed if you use some elbow grease (so to speak) and sort out your files into artist-album folders, with tracks numbered and tagged properly. This also gives you the option of navigating by folders rather than relying on FiiO Music to sort things for you.
I understand this doesn’t work for everyone, and everyone listens to music differently, just saying I keep my files neat, foldered, tagged and catalogued, and don’t listen to random tracks or singles (and when I do it’s normally through Tidal, which is also great for discovering new music).
Maybe I’m just old school but I don’t expect my software to just figure everything out when it comes to my music files (I have 4000+ albums after all). The same goes for Audirvana, which is infinitely more powerful than FiiO Music.
Yeah, I go by using the folders rather than any other option tracks or albums. That's how I did it on my X5II so that feels like the normal way to do it for me anyway.