Hi,
Take a look at your /etc/httpd/httpd.conf file, there should be a line in there telling to include all the config files in the /etc/httpd/users directory.
In this directory you’ll find the config files of all the (web sharing) users. In this file there sould be a directive like:
<Directory “/path/to/home-sir/Sites”>
Check if this path is pointing to the actual (Network) home directory, it could be that this directive is pointing to the location where the local home directories are stored.