On May 6, I merged two tags on _Drupal Answers_ (_uri_ and _urls_) and made the second a synonym of the first, using the _merge_ link I see in tag pages like [this][1]. 

> [![screenshot][2]][2]

Since June 1, _urls_ result as new tag, both in the page I see as moderator, and in the [page for new tags][3].

> [![scrrenshot][4]][4]

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> [![screenshot][5]][5]

Why does it happen? How can I fix this? Do I need to remove the synonym, and recreate it?


  [1]: http://drupal.stackexchange.com/questions/tagged/blocks
  [2]: https://i.sstatic.net/TOXNL.png
  [3]: http://drupal.stackexchange.com/tags?tab=new
  [4]: https://i.sstatic.net/7sfsa.png
  [5]: https://i.sstatic.net/A9MpK.png