Endless Space® 2: OST

This store page advertises 54 tracks, however, only 34 are actually included in the package

If I try to play these from Steam library

... nothing happens, naturally.

Some of those tracks are included in separate paid packages though, but they are too not without issues.

Endless Space® 2 - Lost Symphony Soundtrack

promises 7 tracks, when in fact includes 8. First track, Boltzmann Brains, isn't listed, so when you click on track from Library it plays one track before:

 While the presense of "bonus track" is cool, i think Time of Change (Vaulters Theme) got here by mistake, as it's not part of the Endless Space® 2 - Lost Symphony DLC.

This OST is also somehow packaged with MP3s from next one, Harmonic Memories, instead of Lost Symphony:

Last one, Endless Space® 2 - Harmonic Memories Soundtrack, boasts more tracks then it should too:

You've also mixed MP3s with WAVs into shared folder, and Steam sometimes loads MP3 instead of WAV, as evident from screenshot above. Notice that Magenta Clouds track name starts with "01" and doesn't have "FlyByNo" read from ARTIST tag, which corresponds to MP3 file. I think you should move MP3s in separate subfolders or exclude them altogether from package to avoid this.

As of now, tracks from Supremacy, Penumbra and Awakaning DLCs (Hissho, Umbral Choir and Nakalim themes respectively) aren't included in any of these packages.

And why only Harmonic Memories have WAV tracks properly tagged?

Lastly, would it be possible to include additional artwork, seen through "View Additional Artwork" button, inside the package, so it could be stored and viewed locally? Maybe even include cover images inside track files themselves, as you wonderfully did with regular music bundled with game/DLCs?

Guys, I just wanted to support Arnaud by paying for his music, but this is unacceptable level of service. I know Steam Soundtracks/Music is mess of a feature, I have multiple problems with other soundtracks purchased from other games and developers here, but none of them are messed up as much as these ones you've made. Step up, Amplitude!