Files aren't deleted from my Android device

[Zamana]

Hi.

This is the first time that I use Subsonic and use this forum.

I'm using the latest versions of Subsonic both on the server (Ubuntu server 13.10) and Android (Nexus 4/Stock KitKat).

I realized that after pin/downloding a music file from the server to my phone wirelessly, using the Android app, the file isn't deleted from the phone if I later decided to delete it. I mean, the music file disappears from my library, but it is right there on subsonic/Music folder.

Is this bug, right?

Thanks.
regards.