- Your power is too high. Under RF> Show Advanced, Make the Minimum Transmit Power 12 and the Maximum Transmit 15.
- You are using 80 mhz channels when you should use 20 or 40 mhz channels. Under RF> Show Advanced, Change 80 Mhz Support to Disabled.
- In your SSID, under Advanced Make Sure that Broadcast Filtering is changed to ARP.
After you do that, take another screenshot of your APs and do another test...