You can set up multiple hubs but you need to start from scratch with a new location with no hubs created from the WEB interface. Then you need to log in from multiple IOS and/or Android devices and use each one to add a new hub at the same time. Make sure you start the process on all devices at the same time so each device adds a hub first.
Once added it all works seamlessly.
I saw the comment about not being able to control a device from multiple hubs but this is a non issue. The reason you want multiple hubs is because you cannot span the whole location with one mesh so one device, one hub is fine. Putting all devices n one location is all you need. You don’t care which hub it is you are only looking at the device.