The "hub room" is the location of your Sofihub. Most often this is the lounge or kitchen.
Go to portal.sofihub.com to login and choose "Settings" from the menu on the left.
Make sure to select the room your hub is located in. e.g. Kitchen
The "hub room" exit sensor's purpose is to know that you have left the hub room.
Therefore; it should only trigger when you enter or exit the hub room.
It should not trigger when the "hub room" sensor triggers.
The sensor cover allows you to reduce the sensors capture area to a narrow field, ideally this is placed so that it points across a doorway.