Removing Access to Deactivated Themes

I activated a theme and made it available to blogs.

It was used on my test blog, and I later deactivated it on the test blog.

I deactivated it in the site admin panel, however it continues to appear in the blog list of available themes.

Is there a way to remove access to a theme that has been used and have the affected themes (if the disabled theme was active) roll back to the default theme?

thanks,
Kirk