I apologize I'm misinformed. I was basing myself off in some other comment who phrased it like this:
"In the documentary it is mentioned that he first took pictures of her and then said, "Now let's get some of you and your boyfriend", meaning Brad. Amy told him "That's not my boyfriend, that's my baby brother!". The photographer recognized Amy, according to her mother, when they walked into the gallery to get the photos. He went right to the spot he had put her pictures and started looking. When he couldn't find them, he asked her if anyone in her group might have gotten them. They had not. He found it very odd. Her mother then asks him if he can retake them and he does. That's the story they told in the doc."
Going by your version, there were plenty of pictures and it was up to any passenger to find their own, and they didn't find Amy's photos, and the photographer 100% recognized her and went to the gallery to the place where her pictures had been placed (was he the one placing them there?). Then he didn't find it in that spot and took some other ones. No indication whatsoever that no other 'physical pictures' had been taken away or were missing. Plenty of people just never even go to those galleries looking for them.