## 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={"key": "val", "$current_url": "/another/page"},
        )
        action = Action.objects.create(name="sign up", team=self.team)
        ActionStep.objects.create(
            action=action,
            event="sign up",
            url="/some/page",
            properties=[{"key": "key", "type": "event", "value": ["val"], "operator": "exact"}],
        )
        response = Trends().run(
            Filter(data={"date_from": "-14d", "actions": [{"id": action.pk, "type": "actions", "order": 0}]}),
            self.team,
        )
        self.assertEqual(response[0]["count"], 2)
    def test_trends_math_without_math_property(self):
        with self.assertRaises(ValidationError):
            Trends().run(Filter(data={"events": [{"id": "sign up", "math": "sum"}]}), self.team)
    @patch("posthog.queries.trends.trends.insight_sync_execute")
    def test_should_throw_exception(self, patch_sync_execute):
        self._create_events()
        patch_sync_execute.side_effect = Exception()
        # 
        with self.assertRaises(Exception):
            with self.settings(TEST=False, DEBUG=False):
                Trends().run(
                    Filter(data={"events": [{"id": "sign up", "name": "sign up", "type": "events", "order": 0}]}),
                    self.team,
                )
    @snapshot_clickhouse_queries
    def test_timezones_hourly(self):