## 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
"1-Nov-2020 13:00",
                        "1-Nov-2020 14:00",
                        "1-Nov-2020 15:00",
                        "1-Nov-2020 16:00",
                        "1-Nov-2020 17:00",
                        "1-Nov-2020 18:00",
                        "1-Nov-2020 19:00",
                        "1-Nov-2020 20:00",
                        "1-Nov-2020 21:00",
                        "1-Nov-2020 22:00",
                        "1-Nov-2020 23:00",
                    ],
                    "days": [
                        "2020-11-01 12:00:00",
                        "2020-11-01 13:00:00",
                        "2020-11-01 14:00:00",
                        "2020-11-01 15:00:00",
                        "2020-11-01 16:00:00",
                        "2020-11-01 17:00:00",
                        "2020-11-01 18:00:00",
                        "2020-11-01 19:00:00",
                        "2020-11-01 20:00:00",
                        "2020-11-01 21:00:00",
                        "2020-11-01 22:00:00",
                        "2020-11-01 23:00:00",
                    ],
                }
            ],
        )
    def test_day_interval(self):