nope, thats a new one on me. Are you by any chance running through a router and the ip address is 192.168.0.1 ? Just a thought.
Not possible unless they are on two completly separate networks. If they were on the same network there would be a conflict, the switch will not know which computer to send data to! Its like two houses on one street having the same house number! Poor postman! And yes, elaborate a bit!