LAN SetUp Address Reservation Issue

Model : CAX80 (not allowing me to enter this in)

I am having an issue trying to add devices to my Address reservation table. It is Menu Item: Advanced --- Set up --- LAN Set Up.

I added a device and the IP address did not change to the one I entered...

All the entries are ok, but the two I added turned out to be what was below when I rebooted the gateway.

31 0.0.0.0 00:00:00:00:00:00
32 0.0.0.0 00:00:00:00:00:00

I chatted with a netgear representative, and I reinstalled the firmware....I then reset the gateway to factory settings....I saved my settings and loaded that file. I then tried adding a device to that table and got the above results. 

I did make sure that the address I entered was in the proper IP address range.