> Many sites use multiple servers for load balancing.
> If you're mirroring by host name, the IP address
> shouldn't be looked at.

AFAICS, the IP address was directly given.

The unicity of a host is based on the host itself (not the IP address) ; and
httrack even normalize the host in certain way (www.foo.com and foo.com are
considered similar if the normalize option is enabled)