How to Get Keyword Categories Re-Classified

Recently, IMDB has added keyword categories, and I have been helping re-classify entries.  Most often I am moving items from Plot Detail to Other or Plot Timeline when the keyword is clearly not a plot detail.

About 20% of the time, the approvers decline my update with a response that appears as if I were *adding* the keyword, not correcting the classification.  This will happen on the exact same keyword that is approved elsewhere sometimes.  For example, I recently tried to update a keyword "1980s" from Plot Detail to Plot Timeline.  It was rejected with the response "we cannot confirm this submission".  What's to confirm - it already exists.  I am just suggesting that if it exists, it is not a Plot Detail.

I cannot seem to find anywhere to add comments anymore on the initial request, and the film did not appear in my contributor list to edit/re-submit.  Any suggestions for how to add comments to explain I am not adding the keyword, just changing its category?  I use the elipses on the keyword form to create the request.  Thanks!