There appears to be reptition in the instructions for configuring apache 2.2 on Debian 7:

 

mkdir -p /etc/apache2/sites-enabled/
chown root:0 /etc/apache2/sites-enabled/
chmod 0600 /etc/apache2/sites-enabled/
mkdir -p /etc/apache2/sites-enabled/
chown root:0 /etc/apache2/sites-enabled/
chmod 0600 /etc/apache2/sites-enabled/
mkdir -p /var/customers/webs/
mkdir -p /var/customers/logs/
mkdir -p /var/customers/tmp
chmod 1777 /var/customers/tmp
a2dismod userdir
/etc/init.d/apache2 restart

Depends on your settings, it's 1) the vhost-configuration file or directory and 2) the diroptions-configuration file or directory. If both have the same value, it ends up in the commands being displayed twice which does no harm at all