Library duplicates are not removed although the file is deleted.

Always handle quality updates like moving media files:

  1. add the updated file
  2. ‘Scan Library Files’
  3. movie poster shows the ‘duplicate’ indicator
  4. remove the old version file
  5. ‘Scan Library Files’
  6. empty library trash

This will prevent the updated file from appearing under ‘recently added’.
Steps 5 and 6 will get rid of the old link to the removed file.