## Bug description

*Please describe.*  
- some datapoints show 0 but people will appear in modal

*If this affects the front-end, screenshots would be of great help.*  

## Expected behavior
- amount of people and datapoint should be the same


## How to reproduce

1. demo data clickhouse instance
2. go to retention trends for a day with some people


## Environment

- [ ] PostHog Cloud
- [ ] self-hosted PostHog, version/commit: _please provide_

## Additional context



#### *Thank you* for your bug report – we love squashing them!

posthog/queries/test/test_retention.py
("person1", self._date(day=0, hour=4)),
                    ("person1", self._date(day=0, hour=5)),
                    ("person2", self._date(day=0, hour=5)),
                    ("person2", self._date(day=0, hour=6)),
                    ("person1", self._date(day=0, hour=8)),
                    ("person2", self._date(day=0, hour=10)),
                ]
            )
            filter = RetentionFilter(data={"date_to": self._date(0, hour=10), "period": "Hour"})
            result = retention().run(filter, self.team, total_intervals=11)
            self.assertEqual(
                self.pluck(result, "label"),
                [
                    "Hour 0",
                    "Hour 1",
                    "Hour 2",
                    "Hour 3",
                    "Hour 4",
                    "Hour 5",
                    "Hour 6",
                    "Hour 7",
                    "Hour 8",
                    "Hour 9",
                    "Hour 10",
                ],
            )
            self.assertEqual(
                self.pluck(result, "values", "count"),
                [
                    [2, 2, 2, 0, 1, 2, 1, 0, 1, 0, 1],