The reason it showed up in Command Center as not installed, even though it was already installed on your system, is that Command Center only tracks installs that have been launched from Command Center, so it had no awareness of your having manually installed it on some earlier occasion.
When I made the move to Command Center for maintaining installs/uninstalls/updates, I sacrificed a BUNCH of time to sit there and have all products that show up in Command Center installed, even though they already were installed on my system. This was a GIANT pain in the bee hive, but now just about everything is under the umbrella of Command Center, and maintenance now is super simple and super painless. I can also roll back as needed, and that is important to me, and it works.
Bob Bone