Incorrect subdomain setup

[moogle]

I'm having an issue with subdomains on an account.

The client has set up a subdomain (sub.domain.com) and it is working. However, when you go to domain.com/sub, it changes to "sub.domain.com/sub" and, since that doesn't exist, it gives a 404. BUT! Another subdomain she has does this same thing and DOES still work..

I checked the httpd.conf and her .htaccess (one account doesn't have one), all seems normal.

Has anyone experienced this and been able to resolve it?

[WebScHoLaR]

Can you post the VirtualHost section of the subdomain and the .htaccess contents?