OT: Annoying Vista Laptop and network

[Xrati]

I noticed when I set my router up for my network that it took the ip address of 192.168.1.1 which I had given to my oldest computer. It seemed that it was hardwired into the unit and I had to go change all the other computers ip addresses. Is that the norm for using routers? Not that it caused any problems, but I had to reset all the computers as I had them all in manual ip address settings due to the firewall on the system. I use the router to hook up to the wireless so all the computers can go online at once or just the one I'm using.