Typo in Step 2. It should say:
2. Run notify-send "Notification 1" "This is ONE" Outcome: The "Notification 1" shows below Brightness notification (correct behaviour)
Typo in Step 2. It should say:
2. Run notify-send "Notification 1" "This is ONE"
Outcome: The "Notification 1" shows below Brightness notification (correct behaviour)