You have approved the update for 2 of the 4 possible 'update groups' that you have.
If you want that to go to 4/4, simply right click and approve for the other 2 groups. Another way is to approve to "All Computers" and then press CTRL+C to force the inheritance down (or choose by the menu - apply to all children) and then it will apply only to "All Computers" but also all groups underneath will be "inherited from parent"
See the approvals process of my guide.