Caylee looks so cute in the photos. I'm going to guess that these photos from the gallery
Caylee Anthony: A Life Cut Short
http://www.cbsnews.com/2300-504083_162-10003416.html
were part of the package of photos and videos that Cindy sold to 48 hours.
Looking at the names of the photos (when you go to the CBS website you can save the photos, most of the photos look like they are re-named by CBS and are mostly in chronological order. Given that the last photo in the series of 56 photos has the file name of Caylee_(72), and photo 2 in the gallery (the newborn swaddled with a hat) is Caylee_(7), I think CBS probably got a lot of photos from Cindy and didn't publish all of them.
There's also a related gallery on the CBS website,
Casey Anthony Personal Photos
http://www.cbsnews.com/2300-504083_162-10003419.html
most of them are photos of Casey with Caylee and some of those photos look like they were from her facebook, but photo 4 in the series of 32 photos (Casey is holding a baby Caylee in a pink top has the file name Caylee_(16). There's also a few more photos that are similary numbered and I downloaded both galleries and then looked at the photos in my Windows explorer as thumbnails by file name and by modified (ie I downloaded all the photos from 1 gallery first in sequence, and then I downloaded all the photos from the second gallery in sequence.)
So I'm going to guess that the photos from the gallery named Caylee Anthony: A Life Cut Short and the gallery named Casey Anthony Personal Photos were acquired at the same time and probably scanned and the files renamed at the same time, but CBS decided not to publish all of the photos at the same time. CBS put the Caylee photos by herself or with her relatives other than Casey into one gallery and the photos of Casey with Caylee into another gallery. It also looks like there are a few numbers missing from the sequence of photos so that makes me wonder if CBS has a few more photos that they haven't published since I counted 12 photos missing from the sequence of photos from the combined 2 galleries unless there's a third gallery in CBS that isn't showing up.