Keynote needs updated but doesn't appear in app store and won't let me repurchase
When opening a Keynote presentation created on my iPad2 on my iMac, I get this error "You need a newer version of Keynote to open this presentation." When I go to the App store, there is no update available. So after learning that I can't update, I've tried to repurchase and I get "We could not complete your purchase." becaise it's already installed. I am then redirected to choose software update from the Apple Menu. Software Update returns me to the App Store and that no updates are available.
Keynote-OTHER, OS X Mountain Lion