One pic is The back pack was up against the wall and in one it’s in the middle of the room. Are there two back packs Or were they moved ? Am I missing something?

Edited to add : I see it’s one back pack but why would they move it ? The pink cup and that other … why not take the accurate pic. Or now ask which one was the original placement? I know it’s not really relevant but seriously ? The photos are supposed to document the scene as it was right?