WIN 7 .bat file to change IP address .. DHCP problem

I have a few batch files that I use to switch NIC settings.  These are all "Run as Administrator".

For static IP, I use this:

@ECHO OFF
set varip=192.168.0.99
set varsm=255.255.255.0
set vargw=192.168.0.1
set vargwmetric=1
set vardns1=192.168.0.1
set vardns2=8.8.8.8
set vardnsindex1=1
set vardnsindex2=2

REM ***** You don’t need to change anything below this line! ******
ECHO Setting IP, mask, gateway and DNS
REM netsh set address "Local Area Connection" static %varip% %varsm% %vargw% %vargwmetric%
netsh interface ip set address "Local Area Connection" static %varip% %varsm% %vargw% %vargwmetric%
ECHO Setting Primary DNS
netsh interface ip set dns name="Local Area Connection" source=static address=none
ECHO Setting primary DNS
netsh interface ip add dns  name="Local Area Connection" %vardns1% index=%vardnsindex1%
ECHO Setting secondary DNS
netsh interface ip add dnsserver "Local Area Connection" %vardns2% index=%vardnsindex2%
ECHO Here are the new settings for %computername%:
netsh int ip show config
pause
end

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To switch to DHCP "get an address automatically", I use this:

@ECHO OFF
REM ***** You don’t need to change anything below this line! ******
netsh interface ip set address name="Local Area Connection" dhcp
netsh interface ip set dns name="Local Area Connection" dhcp
netsh interface ip set default gateway name="Local Area Connection" dhcp
netsh interface ip show config[embed=file 906425]
pause
end

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The problem is, that when I switch from a static address to a DHCP configuration, the default gateway IP address remains and the DHCP button isn't turned on - and the NIC settings dialog appears to disagree with the results of ipconfig that says DHCP YES!


At the same time, the NIC ipv4 settings look like this:

What might be the problem here?