I converted some posts to a custom post type using Post Type Switcher. Worked beautifully. This custom post type doesn't use the standard categories. The only thing is they are still showing as being assigned to the standard categories they were part of. The number of posts under Posts -> Categories still indicates they have a standard category assigned.
When I create a new post under the custom post type the default standard category is not assigned. How can I remove the category from the converted posts?