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This does seem a bit odd. but the domain also doesn't have any inbound links which is what I believe is one of the main things that Moz tool picks up. Perhaps you should build a couple of inbound links to the domain and see what happens?

I've had a look at your site (it's in the htaccess) I've run a crawl on your site, there doesn't seem to be any redirect chains, which is good, so you've got no issues with what you have above. However on a side note, I wouldn't rely on 301 redirects, you still have a lot of "old" links that are going through 301 redirects, I would update these so they don't need to pass through a redirect.

Hi, To answer the question so far the grade of the page is A . I have had a look at this issue over the weekend and the problem seems to be the following http://www.eafs.eu/contracting-europe/working-in-netherlands/dutch-payroll/ This page is graded as Page Authority 1 and is the URL format used on the navigation, canonical meta tag and sitemap. This page has an .htaccess directive to strip (.php & add a trailing slash). Ref: http://moz.com/researchtools/ose/links?site=http%3A%2F%2Fwww.eafs.eu%2Fcontracting-europe%2Fworking-in-netherlands%2Fdutch-payroll%2F http://www.eafs.eu/contracting-europe/working-in-netherlands/dutch-payroll.php The correct URL and not used anywhere on the website but is graded as PA 12 REF: http://moz.com/researchtools/ose/links?site=http%3A%2F%2Fwww.eafs.eu%2Fcontracting-europe%2Fworking-in-netherlands%2Fdutch-payroll.php So should I be using the full URL with .php on the website or use the cleaned/canonical URL on the site and why is there such a difference in Page Authority? Am i missing something?