I've installed Pages, Keynote and Numbers since mavericks launch. Just this month, Numbers and Keynote won't open and opens Mac App Store instead. This forces numbers and keynote to be "updated" though keynote is asking for a 444 MB download. This is the same as installing keynote again. Same happens for numbers.
This is getting annoying because I have already installed keynote twice this month.
This is getting annoying because I have already installed keynote twice this month.