I cannot get 5 GHz from my RE650. During troubleshooting I noticed the MAC address kept changing. The device says it is 74:DA:88:21:79:51. When I look at my network devices it shows up as 3 different devices - 76:DA:88:21:79:51 and 76:DA:88:65:B2:6F and 76:DA:88:01:79:52. How can a single device have 3 MAC addresses and does this have anything to do with not being to establish 5 GHz? My gateway/router is capable and my previous extender TP-Link RE450 received 2.4 and 5 GHz.
My ISP is AT&T and my router is a Pace Plc 5268AC.