Some Fields in Categories table aren't updated on Category delete

[B]1.[/B] Field CachedDescendantCatsQty in Categories table isn't updated on when CategoryA sub-category is deleted.

This results in "+" icon showing next to this category in tree, but when pressed no sub-categories are displayed.

[B]2.[/B] TreeLeft and TreeRight fields are not updated to, resulting "TreeRight minus TreeLeft" no longer return recursive sub-category count of given category.