The first time that the trio are hiding behind the pumpkin patch Hermione turns around when she see's her future self hidden in the bushes. This means that the original time we saw the trio future Harry and Hermione exsisted.
However, when Hermione punches Draco, Harry and Hermione are watching from the enterance of Hogwarts. The first time we see it, there is no Harry and Hermione watching and you can clearly see the enterance over Ron's shoulder.
It get's confusing
Also in the time turner scene, things happen a lot more faster then originally. When the group leaves the whomping willow Hermione comforts Ron for a long time when Sirius and Harry chat, then Lupin and Pettigrew come and Lupin turns into a werewolf. However, second time around they seem themselves come out and about ten seconds pass as Lupin's a werewolf.