accidentally created two homes

Good evening, in my single home, I installed a smart indoor camera, a smarther2 thermostat, and a 300EOS video intercom.

During installation, I probably accidentally created two homes: one has the thermostat and indoor camera, and the other has the video intercom.

The user interface is a disaster; I have to switch between homes to get the full picture, and I'm also planning to install one or two outdoor cameras.

How can I have all the devices in one home? I hope I don't have to erase everything and reinstall from scratch. Will I lose all my data?

Thanks in advance.