Wifi not always seeing 5GHz

Hi all,

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So my Hack has a TP-Link Wifi card that works natively and is seen as an AirPort Extreme card. It works flawlessly except for one thing: it doesn't see 5GHz. At least, it doesn't always see it... I have a TP-Link router AC5400 which broadcasts 2 simultaneous 5GHz bands, but oddly my Hack would only see one of the two. After a reset of the router, it started seeing both bands again, and since I'd been having some router issues, I never really thought about it and figured the router was wonky. The strange part was nonetheless that both my MBP saw both bands even before the reset...

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But the plot thickened when I switched my router over to an old Cisco (waiting for a replacement): this one has only one 5GHz broadcast band and this time, the Hack only sees the 2.4, no 5GHz at all. It's seen by all my other devices so I now am convinced the issue is my Hack, but I can't figure how come it worked on and off like that.

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Are there settings I need to verify in the router that I wouldn't be aware of? Here's the en1 report in case it helps; I am no networking guru (FYI none of the other networks are even in my house, yet I can see a 5GHz frequency from a neighbours router....?)

 Software Versions: CoreWLAN: 11.0 (1200.31) CoreWLANKit: 12.0 (1200.31) Menu Extra: 12.0 (1200.47.1) System Information: 12.0 (1200.3) IO80211 Family: 12.0 (1200.12.2) Diagnostics: 7.0 (700.5) AirPort Utility: 6.3.7 (637.6) Interfaces: en1: Card Type: AirPort Extreme (0x168C, 0x3112) Firmware Version: Atheros 9380: 4.0.74.0-P2P MAC Address: 10:fe:ed:24:0f:7f Locale: Unknown Country Code: Supported PHY Modes: 802.11 a/b/g/n Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64 Wake On Wireless: Supported AirDrop: Supported Status: Connected Current Network Information: [REDACTED]: PHY Mode: 802.11n BSSID: [REDACTED] Channel: 6 Country Code: Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -45 dBm / -88 dBm Transmit Rate: 144 MCS Index: 15 Other Local Wi-Fi Networks: DIRECT-B2-HP OfficeJet Pro 6970: PHY Mode: 802.11n BSSID: c8:d3:ff:66:a6:b3 Channel: 6 Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -82 dBm / -96 dBm TRENDnet652: PHY Mode: 802.11n BSSID: 00:14:d1:b6:69:93 Channel: 6 Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -86 dBm / -96 dBm VIDEOTRON5734: PHY Mode: 802.11n BSSID: b8:ec:a3:d4:34:a0 Channel: 1 Country Code: US Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -82 dBm / -96 dBm VIDEOTRON8513: PHY Mode: 802.11n BSSID: b8:ec:a3:35:a6:b0 Channel: 1 Country Code: US Network Type: Infrastructure Security: WPA/WPA2 Personal Signal / Noise: -56 dBm / -96 dBm VIDEOTRON8513_5GHz: PHY Mode: 802.11n BSSID: b8:ec:a3:35:a6:b1 Channel: 44,+1 Country Code: US Network Type: Infrastructure Security: WPA/WPA2 Personal Signal / Noise: -59 dBm / -96 dBm VIRGIN270: PHY Mode: 802.11n BSSID: 18:90:d8:dc:99:1e Channel: 11 Country Code: CA Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -77 dBm / -96 dBm VIRGIN456: PHY Mode: 802.11n BSSID: 18:90:d8:dc:97:1e Channel: 11 Country Code: CA Network Type: Infrastructure Security: WPA2 Personal Signal / Noise: -74 dBm / -96 dBm 

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