Updating firmware on multiple extenders issue

I have two EX3700 and one EX2700 extenders.  The EX3700's are both connected to my WiFi via ethernet and used as hotspots (Access Point Mode).  The EX2700 is connected to the same WiFi via a wireless connection.  I assigned unique SSID names to each extender.  They work great but I'm having an issue updating the firmware on the EX3700's.  I was able to update the EX2700 following the Netgear firmware update instructions.  However following the same for the EX3700's has failed.  When I connect to either of the EX3700's I am immediately directed to the EX2700 extender update.  Any suggestions??