I had an issue with WLAN 2 after the recent upgrade, but not to the extent you're having. Upon using wlan 2 connect in client mode to my router, it would work then stop routing. I would just have to use one of the installed radios to connect successfully in client mode. It may be the USB adapter I'm using, it is a no name Alfa clone. When I have a chance i'll use the Hak5 adapter and give it another try.
So no routing at all when wlan 2 is even siting idle? What type of adapter is it?