I kept pushing the Update button and nothing was happening, heh. Turns out that I have the "Get Me Up To Date" option turned on in the update section so it automatically updates and reboots without intervention. I leave my machine on 24/7 as a Plex server. The only way to tell is that the computer has rebooted itself and I check the About System version number. Only then did I find out that I already had this latest update installed.