Album List – Odd Sort Behaviour

Firstly apologies if this has been covered elsewhere, I did try searching but it’s not a particularly easy thing to search so I could well have missed the information.

I running Kodi 16.1 on a Raspberry Pi 2 on OSMC with a pretty vanilla configuration.

I have a lot of music on an external USB drive which I have added as a source and imported to Kodi.

The odd behaviour (at least it seems odd to me) is that in Music>Library>Albums, where I have multiple compilation albums from the same series the numbered releases, i.e. from 2 onwards, appear in the list before the original release. That’s kind of hard to explain so here’s a couple of examples:

Absolute Hardcore 2
Absolute Hardcore

Back To The Old Skool 2
Back To The Old Skool Drum N Bass
Back To The Old Skool

What I would expect to see is:

Absolute Hardcore
Absolute Hardcore 2

Back To The Old Skool
Back To The Old Skool 2
Back To The Old Skool Drum N Bass

My view options are:

View:List
Sort by:Album
Sort:Ascending

Strangely if I change this to:

View:List
Sort by:Artist
Sort:Ascending

It appears the secondary sort of album name works as expected, so I see the following:

Back To The Old Skool / Various Artists
Back To The Old Skool 2 / Various Artists
Back To The Old Skool Drum N Bass / Various Artists

I don’t know if this is a bug, something wrong with my set up or if I’m just missing a fundamental understanding of how the sort works but if anyone can shed any light on this it would be appreciated.

Thanks