They're mixed up for every person. You can't say "1st goes with 3rd" etc because it's different for everyone.
The one with Sarah being too tired to stand straight goes with slaves being forced to work in cotton fields all day.
The one about not being able to take their wings across the water on the ships goes with the enslaved people being crowded onto ships.
The one with the slaves flying to free-dom goes with the enslaved people running away from plantations.
The one with the children of people who couldn't fly told their children goes with the enslaved African Americans passing down their heritage through stories