"Random" order of TV series episodes

I notice that on my iPad, Infuse orders TV episodes in an apparently random order (see attached image). I have tried having the “Embedded metadata” option in both off and on positions (clearing the metadata inbetween), with the same result.

I have used Handbrake to rip all my DVDs with TV series. I have then used Subler to add/edit metadata for each file (episode). All files are named using the “name”.“season"x"episode” pattern. I have checked that the “TV episode #” value added by Subler is correct. The files are not stored locally but on a network share (SMB protocol).

Has anyone else experienced this? Any suggestions on what might be wrong?

PS: The episode order is entirely correct on the tvOS version of Infuse…