That bug has been opened on https://launchpad.net/distros/ubuntu/+source/gnome-system-tools/+bug/31242

"network-admin "double-configures" the interface(s), which is not necessary. If you have a defined location, and choose it from the drop-down menu, your interface(s) will be configured. This is fine. However, when you choose OK to close the application, network-admin reconfigures the interface(s) again! Ludicrous!

For instance, on my IBM laptop, I have an eth0 (wired) and an eth1 (wifi). Choosing my location profile called "Auto, eth0" disables the eth1 device and performs DHCP on eth0. If you later hit OK to close the app, and monitor your ifconfig on eth0, you will see eth0 release the IP and then try to claim another one! There is no reason for "doublie-configuring" the interface!!!

Suggested Fixes (1 or 2):
1) Either ONLY configure the interface(s) once on the Location Profile selection and make the OK button simply exit from network-admin or...
2) Do nothing on the Location Proile selection, and ONLY configure the interface(s) when hitting the OK button to exit the network-admin
--
Kristian Hermansen"