You’re getting confused between notifications (which pop-up on the Home Screen of your mobile device) and the timeline.
If, in the other tab of your event settings, you’ve selected “Send event to timeline” then every event generated will appear on the timeline.
The first event should also create a notification on your mobile device.
If you still have events available in your daily event limit after 30 minutes (there was a limit of 1 event per minute, but it appears from your screenshot that this has now been removed) then you’ll get another notification.
I suggest that you read this…
Pete.