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Hi Josh, If the canonical tags are set correctly, the SEOmoz PRO platform shouldn't throw a duplicate content error for these 2 URLs. 1. Make sure there's not a 3rd (or 4th, 5th, etc) URL reported by SEOmoz that's causing the duplicate content flag. 2. If you suspect an error, feel free to contact the help team at help@seomoz.org. Give them your membership and campaign information, along with the URLs that are causing you problems, and they should be able to help you troubleshoot.