2wire 2701HG-B Gateway has unknown network devices?

i have replaced a 2wire 1000HW gateway with a 2wire 2701HG-B Gateway router/dsl modem. in my network list i am able to see all the computers in my home network with their correct connection type. For some reason , i am getting two IP addresses being assigned to devices for which the connection type is unknown, deciphering the MAC addresses reveals nothing . this is the devices in question and listed as active.

View Device Details

192.168.1.64

Connection Type: Unknown

IP Address: 192.168.1.64

IP Address Allocation: DHCP

IP Address Type: Private (NAT)

Hardware Address: e1:6c:d6:ae:52:90

192.168.1.65

Connection Type: Unknown

IP Address: 192.168.1.65

IP Address Allocation: DHCP

IP Address Type: Private (NAT)

Hardware Address: e9:eb:b3:a6:db:3c

If i reset the network list, the "phantom" devices will disappear, but will later return, maybe under different ip addresses but with the same "Unknown" connection type. Pinging the IP addresses in question returns "destination host unreachable". With my previous 1000HW i never had these "phantom" devices. Is this a feature of these more recent 2701 design?