Thanks @Jake! I found this using Site Orbiter to crawl the site. Is it possible to write a rule in .htaccess to 301 redirect from any /2/ or /3/ URL to the / URL? Do you have any idea what could be causing this? Thanks, Josh

Thanks! What is causing this behavior? How can I stop it? I certainly don't want people to link to these versions or for them to get indexed.

Here is the url:goo.gl/28kEF. Please let me know what other information would be helpful.