What happens if you set single mode G or N on 2.4Ghz and single A mode or N mode on 5Ghz?
Still Incorrect - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-890L PROTOCOL for 2.4GHz to be '802.11b/g/n', when I have it set to only 'Mixed 802.11n'
Correct - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-890L PROTOCOL for 5GHz to be '802.11a', when I have it set to only 'Mixed 802.11a' (Primary 5GHz)
Correct - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-890L PROTOCOL for 5GHz to be '802.11a', when I have it set to only 'Mixed 802.11a' (Secondary 5GHz)
Correct - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-868L PROTOCOL for 2.4GHz to be '802.11n', when I have it set to only 'Mixed 802.11n'
Incorrect - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-868L PROTOCOL for 5GHz to be '802.11ac', when I have it set to only 'Mixed 802.11n'
Incorrect - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-890L PROTOCOL for 5GHz to be '802.11a/n', when I have it set to only 'Mixed 802.11n' (Primary 5GHz)
Incorrect - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-890L PROTOCOL for 5GHz to be '802.11a/n', when I have it set to only 'Mixed 802.11n' (Secondary 5GHz)
Incorrect - WIRELESS DIAGNOSTIC UTILITY is reporting the DIR-868L PROTOCOL for 2.4GHz to be '802.11b/g', when I have it set to only 'Mixed 802.11g'
Cannot set DIR-890L to 'g' only in 2.4GHz
Cannot set DIR-868L to 'n' only in 5GHz
Not sure what is going on here......
Do you have a Windows PC? if so you might try Acrylic wifi scanner. Do a search on that name. Also for Mac there is Sumbler as well. I think it sees AC mode.
I don't have a Windows PC