New versions of apps are available, but app store says no updates
Hi all, I wonder if anyone can help. I'm running a late 2008 aluminum Macbook. It's running 10.9.1 Mavericks with 4 GB of RAM and runs just fine. My problems are with app updates.
Specifically, when I launch Keynote, Pages, Numbers, etc., they all say that a new version is available and it gives me the option to update. However, when I click to update, the app store opens and shows no updates available. Sure enough, when I navigate to specific apps, the versions shown are indeed newer versions than what I'm currently running, yet there is no option to install them, as the button just shows as "installed."
Any idea why the updates are not showing up? Also, why are newer versions on the store not giving me the option to download them, and just showing as already installed?
I've tried restarting to possibly clear out RAM, refreshing the app store page to the current version, etc., but nothing seems to solve it.
Thanks in advance for any help!
-Loren