I have a custom hierarchical taxonomy that is called 'Categories', but serves a different area of the site than the default "Categories" taxonomy. The problem I'm having is with selecting children terms in the interface while posting content. If the user selects and children terms, they move to the top of the Categories box and lose association and visual hierarchy with its parent. Here's an image showing what happens:
I haven't set any unusual parameters that I know of, here's the register_taxonomy call:
register_taxonomy( "workshop_categories", 'workshop', array( "label" => "Categories", "singular_label" => "Category", "rewrite" => true, "show_ui" => "true", 'hierarchical' => true, 'rewrite' => array('slug' => 'category') ) );
Any input is appreciated!