IP addresses

It should be listed under one IP address but it will say it has multiple IP addresses if it has been seen on a number of different IP addresses on the network lately. When connecting to a network using dynamically allocated IP addresses a client device may request the same IP address it had last time (if available, and the server honours such requests), or the server may choose to allocate the same address, or neither. It sounds like the combination of your phone and router tends to result in the address varying.