That's not how it works.
This issue has been discussed on GitHub somewhere.
I suppose it could be a UX matter, but if it's not a valid configuration, I would consider not allowing it to be saved.
I'll go look!
Neither are really high priority though.
Thanks!
I noticed that:
If I make a notification for an Alarm, but do not specify a subalarm type, it does nothing but it does accept the configuration. My expectation was it would notify for all alarms.
When you have multiple alarm notifications you can't tell which one is which when assigning the notification to the device, they all look identical.