Duplicate content with canonical URL?

Hi,

I´m using canonical URL´s for every product to avoid SEO penalty. When I´m crawling my website with User-Agent Mozilla/5.0 / Sistrix I get advice of duplicate content for all products. Is this normal? I was reading an article support.google.com/webmasters/answer/139394 . This is why I´m not shure if google recognize the URL´s as cannonical or not.

Thank you.

Hi,

If you set canonical URLs in your products, you won't get duplicate content issues on product pages ( as long as you cleared your website cache after setting the canonical URLs ).
You can however potentially get duplicate URLs issues on other pages.
For example, if you display a joomla article via two different links.
You can usually check on that with Google's webmaster tools.

Thank you Nicolas. In google webmaster tools it looks fine.