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The robots file will avoid google to show further information on the disallowed pages but it doesn't prevent indexation. They're still indexed (that's why you're seeing them) but with no meta desc nor text taken from the page because google wasn't allowed to retrieve more information. If you want them to start showing info, you'll jsut need to remove that rule from the robots.txt and soon you'll start seeing those pages information showing, but if you want them out of the index you can use GWT to remove them from the index after you've included in each page the noindex meta tag which is the only command which will prevent indexation.