/$1 URL Showing Up

[HDI]

Whenever I crawl my site with any kind of bot or a sitemap generator over my site. it comes up with /$1 version of my URLs. For example:

It gives me hdiconference.com & hdiconference.com/$1 and hdiconference.com/purchases & hdiconference.com/purchases/$1

Then I get warnings saying that it's duplicate content. Here's the problem: I can't find these /$1 URLs anywhere. Even when I type them in, I get a 404 error. I don't know what they are, where they came from, and I can't find them when I scour my code.

So, I'm trying to figure out where the crawlers are picking this up. Where are these things? If sitemap generators and other site crawlers are seeing them, I have to assume that Googlebot is seeing them as well.

Any help? My developers are at a loss as well.

[Daylan]

I had a similar issue and found it was due to (in the case of a MozPro crawl at least) the bot crawling a JS command in the head. One of the commands included an anchor tag that was being read as a link rather than in context of the java script command. Check your JS files/scripts. It might be in there somewhere.

[STPseo]

If you can't find them, you could put a disallow in your robots.txt files to keep them from being crawled.

[HDI]

Perfect. Thanks for the help, guys!