I don't thnk so. Maybe he was lying on the floor then or he was at a different angle or maybe Kishi forgot to draw him.You must be registered for see images
I don't see the fifth zetsu, juugo most likely absorbed him.
There must be a reason why Kishi drew those extra Zetsu. Probably it would be used sooner or later. That's how Kishi has always done things. He never does things without any reason.