Can it be that the publish status iof this pages is not ready?
Background: xowiki makes pages "public" depending on its publish status. While a page is under work, or needs some more changes, it is in "production" mode (in xowiki admin pages marked with the red box). When it is done, the publish status should be set to "ready", it will appear as green. Only "ready" content is made available for syndication (and search, and google site maps).
