Are users of push notifications suppose to use seperate channels?

I implemented Appcelerator push notifications in our app. In the code we simply set channel to "default". Our implementation calls notify.json on Appcelerator server specifying certain cloud_user_id's to identify the people that are supposed to receive a push notification, nevertheless when I specify only 1 user to be notified push notification logs show me that message was delivered to all devices in the "default" channel as successful. Do all those devices indeed get a notification?

Am I supposed to separate 1 user with all its devices in a separate channel? The default implementation provided in the kitchensink simply used channel "default" in the payload to request push notification.

I am really confused about this implementation. It is vital for us that when we send out a notification only the people that we specify in the payload get the notification.

They don't need to, it depends on what you are trying to do?

Can you provide more information