Draft edition - Create categories

Hi

When I change the category where a news has been classified sometimes this category is "new" for that edition, that means that there is no heading in the main page of the newsletter. So, I'm wondering why working in draft mode this category is not created. Instead, I have to go to the main page of the newsletter and add the same news with the bookmarklet to create the desired category. Please, it would be great if in draft mode the new categories could be created as well.

Thanks