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Thank you for the explanation, that makes more sense, since it's directly tied to the custom permalink structure. However the wording in the advanced section does not specify the custom permalink structure. Maybe in the tooltip it could say "Whether the custom permastruct should be prepended". That could specify more accurately.

Ok. So i noticed the behavior doesn't work the same as the native WordPress taxonomy in the admin list. The links within the taxonomy admin column link to the front end page for the taxonomy archive. I would like the native feature of filtering the admin list when clicked.

Also I tried to set a custom setting for priority. key = value. I set category to 20 and tag to 30, to order in the sidebar. However with these settings the metaboxes do not display on the edit page.