## 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_person(
            team_id=self.team.pk,
            distinct_ids=["person4"],
            properties={"email": "test3@posthog.com", "$os": "android", "$browser": "safari"},
        )
        _create_person(
            team_id=self.team.pk,
            distinct_ids=["person5"],
            properties={"email": "test4@posthog.com", "$os": "android", "$browser": "safari"},
        )
        _create_person(
            team_id=self.team.pk,
            distinct_ids=["person6"],
            properties={"email": "test5@posthog.com", "$os": "android", "$browser": "safari"},
        )
        journeys_for(
            team=self.team,
            create_people=False,
            events_by_person={
                "person1": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person2": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person3": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person32": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person4": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person5": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
                "person6": [{"event": "sign up", "properties": {"key": "val"}, "timestamp": datetime(2020, 5, 1, 0)}],
            },
        )
        response = Trends().run(