The baby on the left in the hat could easily be the middle baby. Be nice to have more photos to look at. And baby in middle resembles child on right for sure, and they are both said to be Zero officially.
I admit that it does look like the same kid at first glance. Especially the first two. The woman holding the baby, even though the photo was shot from the rear, does resemble early photos of SAD. Enough to raise questions, that is. She also resembles that “model” in the FMD porn shots. The hairstyle is similar to what we see on the high-school-aged SAD and the model in the porn shots. It seems certain that the photo did appear in that publication. You’re right that they only IMPLY that it was taken that day, at that event, where “the young listened.” If Bari was born in 1959, then he would have been much older than that. If Barry Soetoro was born in August 1961, even he would have been older. That baby looks younger than 6 months old to me. Many babies look alike. Without seeing the kid’s hair, we can’t tell for sure. The baby on the left could be female. Hard to tell.