Has all it's dates of birth incorrect.
Done for that list!
Also, if you click on the paper icon to the left of each person's name you come up to their information page. There will be an "edit" button and you can make changes to that person's information. You just need to highlight the correct date and say why you made the change. It will take a while to complete if the entire list is indexed incorrectly. I hope this helps for the future!