Adding child category when editing post doesn't display the correct hierarchy afterwards

[garyc40]

Try adding a sub-category when editing or adding a new post. The sub-category will jump to the top of the category list, while the parent category will jump to the second place.

This happens when you use Press This as well.

I assume this also happens to custom hierarchical taxonomies.

This happens in 3.0.3 as well.

Expected behavior until we can establish something better. #3130

This plugin written by scribu fixes this bug: ​http://wordpress.org/extend/plugins/category-checklist-tree/

I use it on every site.