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I am running a website through On-page-grader, as www.domain.com and scores an "F" for a specific keyword. When it's ran as www.domain.com/index.php, it scores an "A" for that same keyword and has everything checked other than "keyword in the domain name". There are no other files such as index.htm, or index.html that would interfere and can't figure out why this page is not being recognized. I checked, the robots and .htaccess file, but do not see anything that would hinder. Could this be a server issue?