Music files are displayed twice

I didn't find any problem like this on the forum so I am starting a new topic.

I am using Serviio 1.3.1 on Win7 with Samsung F6750 TV (latest firmware 1114).

Serviio is sharing a main music folder with some subfolders (albums) and also some content in the root folder. The issue is that on TV all files are displayed twice. And also if I want to listen some album, the songs are dubled in the playlist and are also played twice.

Any ideas on what could be wrong?

I just wanted to add here that all playlist files were already removed from the library, but the behaviour is still the same.

Also just to be perfectly clear - this is happening only to some subfolders. On those all files are duplicated and are also played twice.

[zip]

Cpould you send me the contents of your library folder (zipped up) in Serviio installation?

I have reinstalled beacuse of the suggestion in some other case, set the same settings all over again and now it works. Thanx.