Nighthawk X6S Tri-Band Mesh Extender as an Access Point but cannot make it change from 54MBS

I am trying to set my Nighthawk up as a Wireless Access Point and I can do that but no matter what I try it sets each wirless channel to 54Mbs.  Tried channels tried changing the security but I untick Smart and immidiately I change someting it selects Smart again.  I access the speed dropdown to select a higher speed than 45 but it doesnt change.  I have tried disabling 2.4 and one o the 5GHZ channels.  Nothing I do will change that 54Mbs.     After the change the status shows 54Mbs.   Connect my mobile to that Wifi, use Netgear Analytic and it shows 54Mbs.

There has to be a way surely of changing this speed.   It has latest firmware.

I have had it meshed with a non Netgear Router and I can manage to get higher speeds from it, but I am not happy with teh Mesh setup.  I would prefer it to be a WAP.    I have a D-Link WAP and I can  get much higher speeds out of that, thought the Netgear should be better.