Bug: Disabling Parent Category increases listing categories

Hello. I’m using 6.6.7 and note the new dropdown menu for selecting categories to assign to a listing. The number of categories being set in the package.

I only want subcategories to be selectable, up to a maximum of 4. When the parent category is not disabled, I can tick 4 subcategory boxes, and save these. Editing the listing shows these 4 subcategories ticked.

However, I want to prevent users from selecting the parent category, so i enable the disable category feature.
When I examine the categories using ‘Edit Listing’ I find that the parent category is ticked, and the category count is increased by one, thus exceeding the limit I have set on the package.

Please don’t ask me for screen dumps. This is something that can be checked by simply setting up a category with some subcategories, adding a package which allows more than one category, adding a listing which uses the categories whilst the disable category feature is OFF, the switching the disable category feature ON.

I am raising a ticket for this too…..so the fix can be incorporated in a bugfix release.