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I plugged a competitor into the campaign manager that is ranking #1 for many target keywords like "sprinkler parts" (18k broad, 720 exact) and "sprinklers"(550k broad, 4400 exact) and #2 for "sprinkler"(1mil broad, 8100 exact).  This site has over 8500 errors on SEOmoz - I have spent a good deal of time fixing errors on all of our client websites and have gotten them down to 0 errors. I am just wondering if I have been wasting my time and if the errors that SEOmoz reports on even make a difference.  How can a site rank for such high traffic keywords when it has 4k duplicate content and 4k duplicate page title errors?  The site has 75 linking root domains according to opensiteexplorer.  any help on this would be greatly appreciated!