[DanCooper]

there seems to be a bug in Renamer module in Alpha release.

It is not renaming the files correctly.

Despite using this setting for TV show renamer
-$Z - $W2_S?2E?{ - $T}

My files is getting rename to this..

Filename - S01E01 - Filename S01E01.mkv

Is the Title of this episode "Filename S01E01"?

No.
I make a mistake in my first comment please see revised bug / comment
===
Bug is this ...

ShowTitle - S01E01 - ShowTitle S01E01.mkv

OR sometimes to this, if I do an update library or rescrape

ShowTitle - S01E01E01 - Title - Title.mkv

==
This bug has wreck all the shows filename I just scraped cos of the above bug.

Do you have enabled "Lock Episode Title" in settings?

Default Title for new episodes is "TVShow-Name SxxExx". If you use "Lock Episode Title" or if you edit the Episode and leave the title as is, the renamer use the title while renaming.