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I have a ton of duplicate content warnings for my site poker-coaching.net, but I can't see where there are duplicate URLs. I cannot find any function where I could check the original URL vs a list of other URLs where the duplicate content is?

My crawl report for www.poker-coaching.net show a number of duplicate content warnings.
First, it shows a warning for www.poker-coaching.net and www.poker-coaching.net/, although there is a redirect in place for this, and for non-www. to www. as well. So IMO there is no duplicate content here, so why the error message?
Next, it shows a duplicate content warning for a number of pages, but when I click the number on the right, there is no info an which pages contain the duplicate content. Will this info be there later when the crawl is completed? My problem is that this is my oldest site, but since over one year it seems to have a penalty which I can't get rid of - I cannot identify the reason for the penalty. I already rebuilt the site from scratch once, but I still do not see results. If a membership at SEOMOZ would be able to help me bring this site back on track, that would already be worth one years membership fees, so I'd really be very thankful if someone could take a look at the site and give me an idea about what needs to be done here.

My site www.poker-coaching.net is built with Joomla, and I have one main menu that links all articles (app. 120) in one language from the start page. The site has a language selection menu with translations available in 4 other languages, and for each language, there are another 80 articles linked from the main page. The SEOMOZ crawling report now say that I have too many links from the main page. I always thought it was a good thing for SEO to have articles linked from the main page - do I need to restructure my site and start building multi-level menu structures, where I would have a main menu on the start page and the next level menu would only be shown after a user clicks on a main menu item?