Such cases can still be reported as "playback" issues. The staff will then verify the report and if the issue is confirmed remove the torrent* and contact the uploader.
In this case the suggestion to the uploader would be to make another torrent with the missing file(s) added. If the folder structure and other file names are maintained, a jump-on like for reseed of members having the other torrent's files will then be possible.
= if something is wrong with the file(s) in the torrent's file list, a new torrent is needed to share changed file(s). It can't be edited.