Allow duplicate taxonomy slugs?

I’m trying to set up a hierarchical taxonomy within my theme which also uses a hierarchical slug rewrite.

This way I can have a category like “collections”, with a subcategory like “earrings” which yet another subcategory like “hoops”.

One issue I’ve ran into is that there cannot be the same taxonomy slug stored, if a duplicate exists it appends the parent’s slug to the end. Is there any way to allow duplicate entries?

The problem I have is that there are multiple sub-categories of the same name which exist in different categories, but are totally independant.

Example:

Collections/Necklaces/Simple-n-Chic
Collections/Earrings/Simple-n-Chic

However, in creating these links, after defining the first series the second one became:

Collections/Earrings/Simple-n-Chic-Earrings

I do not want this to occur, is there an alternative?

EDIT: The code in use, although it’s currently not “working” on the front end.

register_taxonomy(
    'collections', // name/slug
    'collections', // object type (custom)
    array(
      'name' => 'Collections',
      'hierarchical' => true,
      'update_count_callback' => '_update_post_term_count',
      'labels' => $labels,
      'show_ui' => true,
      'query_var' => true,
      'rewrite' => array( 'hierarchical' => true ),
    )
  );

And here is a screenshot of the taxonomy itself, notice simple-n-chic-earrings… that’s the issue:

http://radleygh.com/images/chrome_2012-222-20-10-15-8.png