## Bug description

Monthly Active Users metric seems wrong when choosing "# Number" as chart type.

Number: 
![image](https://user-images.githubusercontent.com/513669/201980874-be7d9c0d-5c9c-4c1e-955c-ea4143c84061.png)

Line chart: 
![image](https://user-images.githubusercontent.com/513669/201980986-b17af929-84e5-4f6a-b7f8-23b7ac8bedbc.png)

**490 != 70**

## How to reproduce

1. Create a new insight using any event and the "Monthly active users" metric
2. Date range = This month + Grouped by = Day
3. Choose chart type as Number => remember value
4. Change chart type as Linear => check last data point

=> the 2 values do not match
=> in other words there's a diff between a total aggregation and an aggregation per bucket of time ?

## Environment

- [x] PostHog Cloud
posthog/queries/test/test_trends.py
_create_event(
            team=self.team,
            event="watched movie",
            distinct_id="person2",
            timestamp="2020-01-02T12:00:00Z",
            properties={"fake_prop": "value_2"},
        )
        _create_event(
            team=self.team,
            event="watched movie",
            distinct_id="person3",
            timestamp="2020-01-01T12:00:00Z",
            properties={"fake_prop": "value_1"},
        )
        _create_person(team_id=self.team.pk, distinct_ids=["person4"], immediate=True)
        _create_event(
            team=self.team,
            event="watched movie",
            distinct_id="person4",
            timestamp="2020-01-05T12:00:00Z",
            properties={"fake_prop": "value_1"},
        )
        with freeze_time("2020-01-04T13:01:01Z"):
            data = {
                "date_from": "-14d",
                "breakdown": "fake_prop",
                "breakdown_type": "event",
                "display": "ActionsPie",
                "events": [
                    {"id": "watched movie", "name": "watched movie", "type": "events", "order": 0, "math": "dau"}