```python
def count_back(start: int) -> list:
    """The numbers from a start down to one."""
    if start <= 0:
        return []
    
    counted = [value for value in range(start, -1, -1)]
    return counted
```
This solution corrects the main issue by checking if the starting count is less than or equal to zero. If so, it immediately returns an empty list. Otherwise, it proceeds with the original logic of counting down from `start` to 0 in steps of -1 and appends each value to the counted list before returning it.