@u373jk I followed your instructions and got mine to work as well -thanks!
However I find that it doesn't survive a reboot. When it boots up, the SSIDs are both blank on the "Wireless Overview" page, and neither are visible to clients.
If I click "Edit" for one of the wireless interfaces, the next page shows the SSIDs correctly, so I just click "Save & Apply" and somehow that revives the SSIDs and everything works perfectly again (until the next boot).
I've tried to read through the LuCI source code to see how I can trigger this automatically from /etc/rc.local but I can't grok it.
Wondering if this matches your experience, and if you have a solution.