## 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
properties={"$session_id": 4, "$some_property": "value1"},
            timestamp="2020-01-02 00:06:45",
        )
        
        with freeze_time("2020-01-04T13:00:01Z"):
            daily_response = Trends().run(
                Filter(
                    data={
                        "display": TRENDS_TABLE,
                        "interval": "week",
                        "breakdown": "$some_prop",
                        "breakdown_type": "person",
                        "events": [{"id": "sign up", "math": "median", "math_property": "$session_duration"}],
                    }
                ),
                self.team,
            )
        
        
        self.assertEqual([resp["breakdown_value"] for resp in daily_response], ["another_val", "some_val"])
        self.assertEqual([resp["aggregated_value"] for resp in daily_response], [10.0, 5.0])
    @test_with_materialized_columns(["$math_prop", "$some_property"])
    def test_trends_breakdown_with_math_func(self):
        with freeze_time("2020-01-01 00:06:34"):
            for i in range(20):
                _create_person(team_id=self.team.pk, distinct_ids=[f"person{i}"])
                _create_event(
                    team=self.team,
                    event="sign up",
                    distinct_id=f"person{i}",