I believe based on the functionality activated in 188.8.131.52.260.21 on my RT-AC66U I have the device in Wireless Router Mode. In fact when I go to Administration->Operation Mode, that's the selection that's ticked.
However when I view System Log -> Wireless Log, I see this:
Mode : AP Only
Not sure if that last message is just displayed in error or if something else is going on...
Probably not a big deal but just thought I'd point it out