Incorrect indexing

Problem with indexing on a Synology diskstation

I have a directory Video/Series
In that directory I have the following content

Folder The big bang theory (with recorded files of the big bang theory)
File 04-05-17.59_RTL7.ts (recorded transport stream of a Tv program)
File Boundin.mkv (A funny short video fragment)
File The.big.bang.theory.mkv (one file of the big bang theory)

On my Toshiba Regza TV the content of the directory is correctly shown
However when selecting a file for playing, that file is not played, but the next one in the list
I have removed the files from the directory, added them again and indexed again, but the problem stays

After experimenting with removing and adding files I found the following :

If one file in the directory it goes ok
If more files in the directory it goes wrong
If I delete the subdirectory, then everything is ok, also with multiple files in the directory

So my first conclusion is that having a subdirectory throws the indexing off

Has anybody any idea how I can solve this ?

After 2 years I am reposting since the issues is still present (20-09-2015).
I am running Serviio 1.4.1.2 on a Synology Diskstation accessing it from my Windows computer with Serviio console version 1.4.
I am using this in combination with my Toshiba REGZA TV. Serviio list my TV as an Unrecognized device
Profile I am using is "Toshiba Regza 2012-" which is working ok with my TV set.
The device shows up with an orange dot in front at the status screen in Serviio Console.
I am using Serviio to stream video content from my Diskstation to my TV and use a simple setup.
I have made my own directory structure with a top directory called "Video" and under this directory several sub directories which can contain files in addition to other sub directories.
So in the presentation tab in Serviio Console I selected under category name "Video" Display content only in visibility. For the Video subcategory "Folders" I also selected Display content only.
With this set-up all directories and files show up correctly on my TV set. However when the contents of a directory contains n sub directories in addition to files in that directory, then when selecting in that directory a file to play on the TV that file is not played, but the file which is n positions further in the list.
I really don't know if this is a problem related to my TV set or that it is a Serviio indexing problem and would appreciate if anybody could help me to solve this problem.