Statistics graph card showing wrong data

I set up sensor in my sensors.yaml file to count the number of times a switch turns “on” per day and it works as expected.

  • platform: history_stats
    type: count
    name: Pond fill count today
    entity_id: switch.pond_water_control_2
    state: “on”
    start: “{{ today_at() }}”
    end: “{{now()}}”

I then created a Statistics graph card to display these values on a bar chart but it shows the wrong number.

Today it shows 2 when it should be 1 according to the Logbook and History

Any ideas??