RBK853 Satellites are EXTREMELY slow. At this price, I'm sure something is wrong

Hi all,

Just bought a brand new RBK853 system. 

My ATT fiber is 1GB.  The ATT Modem/router Wifi gives out about 200-300 mbps when next to the router.

I am running the Orbi in AP mode because my ATT Pace 5268ac modem/router doesn't have bridge mode and I really only need the orbi for better Wifi coverage.

I have the Modem/Router's Wifi disabled and put the Orbi RBR850 in AP mode.

Firmware is latest 3.2.16.22

I have a 3-story house and the router is in my basement (due to ATT fiber line restrictions)

The Wifi from the orbi router(AP) is great... ~600-800 mbps in the basement

The Wifi from the orbi router when on the 1st floor is ~300 mpbs

The Wifi from the orbi router when on the 2nd floor is ~80 mpbs

So I want to put one satellite on the 1st floor and one on the 2nd floor

However the satellites speed are HORRENDOUS.

So I did a few tests.  

Test with a satellite in the same room as the router (AP). the satellite connected good (blue light)

1) Wired my laptop to the satellite and speedtest showed ~100 mpbs

2) Then tried wireless on the laptop.  Same speed about ~100 mpbs

3) iPhone 12 Pro ~120mpbs

Not good...these satellites I know are being sold as 5GHZ backhaul which should be almost same speed as the Router

so I need the satellites on the other floors, so I moved one to the 1st floor and tested. The satellite connected good (blue light)

1) Wired laptop ~20mpbs

2) Wireless laptop ~20mpbs

3) iPhone 12 Pro ~3.4 mpbs to ~20 mpbs

This is obviously not going to work.  How are these satellites supposed to achieve the speeds being advertised

I tried different settings on the RBR to no avail.

1) I turned off 20/40 mhz coexistence

2) I changed channels on 2.4 and 5ghz

3) This firmware has no options for daisy chain or MU-MIMO or any of the previous advanced settings

I paid close to $1000 for this system and will have to return it if this isn't going to work as advertised.

I have looked at all threads in here and tried everything suggested by FURRYe38.  Nothing helped.

Just a note, I reverted back to my ATT modem/router's Wifi.  I use two dinky AirTies wifi extenders (one on 1st floor and one on 2nd floor).  Those dinky extenders are producing better wifi extension (~50-80 mpbs on both floors) than these Orbi satellites.

I cannot for the life of me see how that can be with a $1000 system vs. a $40 wifi extender

Please help, I really wanted this system to work.

Thanks much,

Chris