Nighthawk MR60 AP mode interferes with guest network access

My router is "Nighthawk Mesh 6 Router MR60"  (why that isn't a model option on this board I do not know)

I have the router and its sattelite in AP mode.

I am using a mask of 255.255.0.0 for the network in my house - and the router i getting that information from the DHCP server in my house (and its IP address too).  That all seems to work.

I'm having it run an SSID with WEP2 as the main network.

I'm having it offer a guest network with WEP3.

Devices hooking to the guest network, are NOT allowed access to anything other than the internet - they cannot access any local device.  PINGs are rejected from any device hooked to the guest network, and they immediate work if the device reconnects ot the WEP2 non-guest WiFi from the same router.

This makes me think that the router has a bug in it - and is not handling the Guest network in a truely AP mode.

I've tried sniffing the networks, and I never see request form the guest network show up on the local network in my house.

I'd like to REPORT this as BUG... but I keep getting asked to submit to COMMUNITY... or PAY for premium support.

The product appears to not working properly.

I'd like some help or advice on how to fix it.

- james