When entering taxonomy terms are new ones added with different pk even if term is already in the dictionary I was expecting taxonomy terms to only be added if they weren't already in the dictionary. However, it seems that I have multiple terms added with different tid's or pk which I wasn't expecting. What is happening here?
Drupal allows you to enter multiple terms with the same name. If you want to have unique term names, use the Taxonomy dupecheck module.


  Taxonomy dupecheck module prevents Drupal administrators from adding
  duplicate taxonomy vocabularies and/or terms.