When the @pretty_title is not the fist column of the query, if there are already drawn arrows and a new row is expanded, old arrows will be "pushed to the right" of the table.

A query exhibiting this behavior:

SELECT @id, @pretty_title, @tracker.name, @project.name, @last_update_date, @submitted_by
FROM @tracker.name IN ('story')
WHERE @id > 1