The same broken link appears in duplicate because of caps in the URL

In the OFF position, the Acquia Optimize scan sees all URLs as lowercase - no matter how they are actually written in the target website. Turn OFF only in rare cases where the target website does not recognize caps and reads all links in lowercase, which results in duplicates in the flagged scan issues. This is an advanced configuration that should normally be left to the default setting.

• Navigate to the Domain Overview page.
• Click Action on the same row as the domain and select Edit Domain from the expanded list.

• Locate the Case sensitive URLs swich. 

  
• Toggle the switch OFF to instruct the scan to ignore capitalization within links, or ON to instruct the scan to make URL links case-sensitive.
  • Example OFF: http://monsido.com/Foo/Bar is seen as the same link as http://monsido.com/foo/bar.
  • Example ON: The same links above will register as two different links.