How Many Echo Presets Can You Have Active Within a Space
You can only have one preset active at a time in an Echo space. That preset will apply to all zones in the space.
For example: if preset 1 is active and you activate preset 2, all zones in your space will go to the levels dictated by preset 2. If they do not have a level of 1% or above in preset 2, they will go to 0, even if preset 1 had them at a level of 1% or higher.
Similarly, Off is a space-wide command.