## 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/trends/breakdown.py
return GroupsJoinQuery(
            self.filter, self.team_id, self.column_optimizer, using_person_on_events=self.using_person_on_events
        ).get_join_query()
    def _sessions_join_condition(self) -> Tuple[str, Dict]:
        session_query = SessionQuery(filter=self.filter, team=self.team)
        if session_query.is_used:
            query, session_params = session_query.get_query()
            return (
                f"""
                    INNER JOIN ({query}) {SessionQuery.SESSION_TABLE_ALIAS}
                    ON {SessionQuery.SESSION_TABLE_ALIAS}.$session_id = e.$session_id
                """,
                session_params,
            )
        return "", {}