Release Year not working

I've update Serviio to 1.3 and left it running for 2 days and all is working well. It's finished scanning meta data etc....
So the new option is to list files by Release year. However only 1 result out of 400 is listed from 2009, nothing else. This would he a useful feature but how do I get better results? All folders and files are clearly labelled with a year so all the clues are in place for Serviio.
Sent from my HTC Desire S using Tapatalk 2
So the new option is to list files by Release year. However only 1 result out of 400 is listed from 2009, nothing else. This would he a useful feature but how do I get better results? All folders and files are clearly labelled with a year so all the clues are in place for Serviio.
Sent from my HTC Desire S using Tapatalk 2