That was an important piece of information! The problem is now a lot easier to understand. Wordpress uses apache re-write rules to make “pretty” (or “search engine friendly”) urls on your site, and it is these re-write rules, that are in the .htaccess file in your web “root” directory where Wordpress is installed that are causing this behavior.
While it seems pretty complicated, it is easy enough to work-around once you understand how it works. Ther is a good guide to this issue on the DH Wiki that addresses the issue as it relates to the WordPress installation making your “mydomain.,com/stats/” directory inaccessible.
The problem is the same, you just need to review that wiki article and substitute the appropriate directory/file information as is appropriate for your site, situation, and affected url, and you will be good to go.