Hi Jeff,
I do not have the Adobe Download Assistant installed. I also do not have any uninstallers from previous CS editions, as they were all trashed.
I also downloaded the CS Cleaner Tool and it did not find any Adobe products on my computer.
I then downloaded 3 different "cleaning" apps from the Apple App Store and none of them found any Adobe products on my machine.
Do you have any other ideas of how to properly install CS6? Obviously, something is wrong here...