Orbi Router (RBR50) & 1-Satellite (RBS50) Download Speeds

This does not sound "normal".  If you are comfortable with "computer stuff", you could check how the Orbi reports the backhaul connection.

• Enable telnet on the Orbi router.
  Open the page http://orbilogin.net/debug.htm
  Check the box "Enable Telnet"
• Access the Orbi router with a telnet client program.
  Windows includes a telnet client that can be activated from the Control Panel, Programs & Features, Turn Windows Features On or Off. (Menu item on the left.)  I personally use the free PuTTY program because it is more convenient for frequent use.
  The Mac no longer includes a telnet program, but there are free programs available on the internet.
• Telnet into the router using the IP address of the Orbi router.  My router is at 192.168.1.1, so I type:
  telnet 192.168.1.1
• Type the command satelliteinfo wifi
• My Orbi reports:
  root@RBR50:/# satelliteinfo wifi
  [
  {
  "mac address" : "A0:04:60:0D:96:FA",
  "hop" : "1",
  "bridge mac" : "A0:04:60:0D:96:FA",
  "backhaul conntype" : "5GHz",
  "backhaul rssi" : "-67",
  "backhaul macaddress" : "A0:04:60:0D:96:FD",
  "backhaul phytxrate" : "975",
  "backhaul phyrxrate" : "877",
  "backhaul parentmac" : "A0:04:60:1C:02:39"
  }
• How does your Orbi report the link between router and satellite?