Indeed to all the above...the Library of Congress has labeled the 1913 family group photo as 1914... So even places that should know better...don't
Did you just use the words "congress" and "know better" in the same sentence Anne? :-)
I don't see anyone other than Alexandra standing in that previous photo. Along with Tatiana to the right, Anastasia to the left and I'm guessing Marie with her back turned. I think the hips give Marie away...the girl had hips!
As far as the girls seeming a little distant and not paying much attention to their mother, which I agree is unusual for them. I think beyond the fact that it's hard to ascertain much from a snapshot and random photo such as this, being in captivity probably changed the way they related to one another somewhat. Seeing even more of their mother than before probably made them act in a more casual manner around her. At the same time living in tighter quarters brought them closer both physically and emotionally to their retainers such Anna Demidova. The lines between servants and friends became non-existent and the lines between friends and family members were at the very least blurred.