## 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
set_instance_setting("STRICT_CACHING_TEAMS", "all")
        fake_cached = {
            "sign up - Chrome_0": {
                "label": "sign up - Chrome",
                "days": ["2020-01-02", "2020-01-03", "2020-01-04"],
                "data": [23.0, 15.0, 1.0],
            },
            "sign up - Safari_0": {
                "label": "sign up - Safari",
                "days": ["2020-01-02", "2020-01-03", "2020-01-04"],
                "data": [12.0, 11.0, 8.0],
            },
        }
        filter = Filter(
            data={"date_from": "2020-01-02", "date_to": "2020-01-04", "events": [{"id": "sign up", "name": "sign up"}]},
            team=self.team,
        )
        result = [
            {"label": "sign up - Chrome", "data": [15.0, 12.0]},
            {"label": "sign up - Safari", "data": [15.0, 9.0]},
        ]
        merged_result, _ = Trends().merge_results(result, fake_cached, 0, filter, self.team)
        self.assertEqual(merged_result[0]["data"], [23.0, 15.0, 12.0])
        self.assertEqual(merged_result[1]["data"], [12.0, 11.0, 9.0])