I just tried the last two URLs and both led to slightly different pages with virtually identical content.
Do you have a CMS site? How are these titles and URLs generated?
One way to eliminate the duplicates is to select the preferred title page and create a 301 redirects from duplicate page to the preferred page.
A temporary method is to copy all the duplicate URLs to the robots.txt file and mark them as disallowed.
I had similar problems and it took Google a very long time before the following status now appears:
HTML ImprovementsLast updated Feb 27, 2014
We didn't detect any content issues with your site. As we crawl your site, we check it to detect any potential issues with content on your pages, including duplicate, missing, or problematic title tags or meta descriptions. These issues won't prevent your site from appearing in Google search results, but paying attention to them can provide Google with more information and even help drive traffic to your site. For example, title and meta description text can appear in search results, and useful, descriptive text is more likely to be clicked on by users. More Information