01 January 0001
You can manually sort the devices on the home page by pressing and holding on a device. This will allow you to change the position of devices on the all devices list.
If you tap the three dots (...) on the right of the Room strip and then tap on Room Management. This will allow you to select the room you wish to add/remove devices from and hit the green plus sign next to the device to add the device to the room and the red minus symbol to remove it.