We are currently using our dual band RE650 extender in high speed mode where the extender and router are communicating exclusively on 5G and the extender is only broadcasting in 2.4.   This works well where we are getting 50Mbs to each bedroom.  The extender is using channel 2 for 2.4 (by default?) and we would like to change that to use 11.  We cannot specify a channel on the RE650 Admin and the changing the 2.4 configuration on the router to use 11 does not change the channel of extender 2.4 signal ince the extender does not extend the 2.4 signal from the router.