Wrong sorting for Air-By-Date Shows

[Kincaid 1]

I am watching my shows via the web interface. I have some shows like The Tonight Show that don't work with season and episode numbers but with airdates. This worked well before I installed MB server on a new machine. Now the sort order is totally messed up. For example I have a folder called "The Tonight Show starring Jimmy Fallon" with a folder called "2014" in it. In this folder are all episodes from 2014 and they are named like this: "The Tonight Show Starring Jimmy Fallon 2014-07-14 - Michael Strahan, Diane Kruger, Phish" and in the Windows Explorer they are sorted correctly. When I am in the 2014 folder in the MB webinterface the episodes are sorted like this:

 

The Tonight Show Starring Jimmy Fallon 2014-07-21 - Kate Hudson, Ellar Coltrane, Nico & Vinz

The Tonight Show Starring Jimmy Fallon 2014-07-17 - Miranda Kerr, Jason Mraz

The Tonight Show Starring Jimmy Fallon 2014-06-06 - Channing Tatum, Joshua Topolsky, Julian McCullough

The Tonight Show Starring Jimmy Fallon 2014-07-23 - Robin Wright, Josh Charles, Weezer

The Tonight Show Starring Jimmy Fallon 2014-05-16 - Drew Barrymore, Giovanni Ribisi, Elbow

 

and so on. I can't see any sorting rule there. The same is with "Last Week Tonight". I even tried to set the sort name only to the date but it didn't change anything.

 

Does anyone know what's wrong with my setup?

[Luke 37161]

Goes by tvdb order, if available

[Kincaid 1]

There are no informations but the name and the sort name, no tvdb id and the order in tvdb is correct, so this shouldn't be a problem.

[Kincaid 1]

No other ideas?