I've used the 1861 census on Ancestry.com before several times. If anything it is "updated." The Ancestry.com blog and the content section of the blog do not mention this item.
How is it different? Is it different in a way that means I should go back and revisit those people I can't find? Have images been improved or enhanced? Or did they just update a part of the index for one specific county? If I don't know how it is different, I don't know how to alter my search.
A reader commented to me privately that we should "just be glad to have the records and 'work with it.' "
I don't agree with that. While I am glad to have access to the records, it's not unreasonable to want to know what databases include and when they are "changed" or "updated" what those changes or updates are.
Especially when we are paying for the service.