Automation executes multiple times?

Configuration
1

I have an automation that switches stuff off at night, and sends a iOS notification when it’s done (last line in the action block) but for some reason it seams to execute several times.
For example last night it sent me 60(!) notifications and no errors or warnings were logged…

- alias: 'Switch Everything Off'
  trigger:
    - platform: time
      hours: 1
      minutes: 0
  condition:
    - condition: state
      entity_id: device_tracker.iphone
      state: 'not_home'
  action:
    - service: shell_command.phue_livingroom_off
    - service: shell_command.phue_bathroom_upper_off
    - service: shell_command.phue_bathroom_lower_off
    - service: shell_command.phue_kitchen_off
    - service: shell_command.phue_bedroom_off
    - service: shell_command.phue_lounge_off
    - service: shell_command.phue_office_off
    - service: shell_command.phue_guestroom_off
#    - service: media_player.sonos_unjoin
    - service: media_player.turn_off
      entity_id:
        - media_player.bathroom_lower
        - media_player.bathroom_upper
        - media_player.bedroom
        - media_player.kitchen
        - media_player.living_room
        - media_player.lounge
        - media_player.office
        - media_player.office
    - service: notify.iOSapp
      data:
        message: 'Music and lights were switched off, good night.'
        title: 'House is sleeping'
2

I think you have to use “after”

automation:
  trigger:
    platform: time
    # Matches every hour at 5 minutes past whole
    minutes: 5
    seconds: 0

automation 2:
  trigger:
    platform: time
    # When 'after' is used, you cannot also match on hour, minute, seconds.
    # Military time format.
    after: '15:32:00'
3

A trigger like

  trigger:
    - platform: time
      hours: 1
      minutes: 0

wil execute every second between 1:00:00 and 1:00:59.
Just add a “seconds: 0” and it should be okay.

Sebastian