TomatoUSB

Hi,
This is really strange to me but might be something common I don't know about. I have not seen it before though and I can't seem to find any info out there about this.
I've been using tomato on my e2000 and other routers for a while. My e2000 that faces my isp is showing two addresses in the device list for vlan2.

They are both WAN ips from my ISP charter.net. One of them is what I recognize as my dhcp address from them 68.xxx.192.254 and the other is this connection that just pops on and off for hours at a time. it is 68.xxx.193.5.
Does anyone know what could be happening here?

correction *one of them is what I recognize as my dhcp gateway address from my isp 68.xxx.192.1 (not 68.xxx.192.254 which is my actual ip).

Also when I ssh in my router and ifconfig I see my vlan 2 broadcast address as 68.xxx.193.255
if that helps.