I can't see the photo you are referring to. they all look to be the same girl.
Regarding the photos looking old? (Did someone query this, can't remember) Looks like a VGA or old camera phone.
As it's not a private gallery I doubt very much that this 'rogue' photo you are referring to could be deliberate as is a completely different person to the others and only the very foolish would assume they would get the slim model advertised.