Changing Computer Name by the dialog doesnt properly change it

When changed the computer name with the dialog it changes it in one place (CurrentControlSet/ComputerName/ComputerName) and leaves the other in tcpip/parameters unchanged.
The dialog is calling SetComputerName but that just changes the NetBios, it should call SetComputerNameEx,with ComputerNamePhysicalDnsHostname, instead, which changes ComputerName and NetBios.