Placement position of item when moving from one column to another in multiple lists

Regarding multiple lists and using this [example](https://main--5fc05e08a4a65d0021ae0bf2.chromatic.com/iframe.html?globals=&args=&id=react-sortable-multiple-lists--example&viewMode=story) taken from [Storybook](
https://main--5fc05e08a4a65d0021ae0bf2.chromatic.com/?path=/story/react-sortable-multiple-lists--example).

Let's say there's a column with only one item, if you drag another item into that column to place in the last position but drag down a little further it looks to place this item at the top of the list.

Seems to work correctly (i.e placing the item in the last position) when the column has a certain number of items (perhaps relative to the height of the column).

Start with the linked Storybook react-sortable-multiple-lists example and reproduce the behavior using a column with one item. Compare dragging an item into the last position with a short and a longer column; done means dropping slightly below the column keeps the item in the last position.

Written by the indexing model from the issue text.