> specifically the hostname which your IP resolves to does NOT in turn > resolve to that hostname.
That's actually legitimate. It's quite common, and absolutely required for virtual hosting. A hostname must resolve to a given IP, but the IP does not have to resolve to that specific hostname. However, a given IP's reverse DNS host name *must* resolve back to the original IP. This check is performed to prevent abuse. -- The nice thing about standards, there is enough for everyone to have their own.
