Vocabulary menu item won't disable or be edited

I have Taxonomy Menu set up for a vocabulary to use a View I defined. So far so good, all the terms show up... but the vocabulary name shows up as a menu item too. I don't want it to show up. I tried to disable it in Menus, but even then it still is enabled. When I tried to edit it, it goes to a Page Not Found. There is no "reset" or "delete" option.

How do I get rid of this vocab menu item?