Mac App Store updates keep repeating; won't clear
LMAO, I finally figured out the problem! I had completely reinstalled Snow Leopard from scratch and used SuperDuper to make a backup clone of my hard drive beforehand (which I had always been doing for backup). Then before putting anything else on, I had visited the Mac App Store to reinstall some software when I noticed it said I had all my apps already installed. It didn't take long to figure out that the Mac App Store reads any cloned hard drives you have attached and interprets them as installed apps as well. This would certainly explain why it thought I still had the older versions still installed. Huge bug.