## 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
person1 = _create_person(team_id=self.team.pk, distinct_ids=["person1"], properties={"name": "person1"})
        person2 = _create_person(team_id=self.team.pk, distinct_ids=["person2"], properties={"name": "person2"})
        person3 = _create_person(team_id=self.team.pk, distinct_ids=["person3"], properties={"name": "person3"})
        person4 = _create_person(team_id=self.team.pk, distinct_ids=["person4"], properties={"name": "person4"})
        journey = {
            "person1": [
                {
                    "event": "watched movie",
                    "timestamp": datetime(2020, 1, 1, 12),
                    "properties": {"order": "1", "name": "1"},
                }
            ],
            "person2": [
                {
                    "event": "watched movie",
                    "timestamp": datetime(2020, 1, 1, 12),
                    "properties": {"order": "1", "name": "2"},
                },
                {
                    "event": "watched movie",
                    "timestamp": datetime(2020, 1, 2, 12),
                    "properties": {"order": "2", "name": "2"},
                },
                {
                    "event": "watched movie",
                    "timestamp": datetime(2020, 1, 2, 12),
                    "properties": {"order": "2", "name": "2"},
                },
            ],