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There are two ways to initial a crawl: 1. There is a weekly crawl associated with any sites for which you have set up a campaign. Each weekly crawl is fresh data. 2. You can manually initiate a crawl by going into your SEOmoz tools and using the Web Crawl tool. Each time you manually start the Web Crawl tool it should be a unique crawl. If you feel you have made the proper changes and the crawl tool is still showing errors the most likely cause is either the changes were not saved on your web server, or the changes were not performed correctly. If you are confident the changes were made correctly, you can also contact the SEOmoz help desk (help@seomoz.org) to report a bug in the web crawl tool.