I am not sure, sometimes i get a corporate portal to log in with and other times i get a Cisco branded one that looks to be straight from the Access point. Both times the captive portal goes to http://2.2.2.2 if that helps.
There is no alternate SSID for a 5GHz access point, all over they have the same SSID, whether different access points use 2.4 or 5GHz i am not sure.
I upgraded to 3.013 last night and still have the same problem, it just keeps disconnecting and reconnecting, sometimes the hotspot from the router itself cuts out for 20 seconds or so and my devices get disconnected from that too. I can provide more logs if it would help?
Thanks again