I'm still puzzled how River got to where Amy and Rory had their wedding. She didn't use the Vortex Manipulator because the Doctor gave it back to her after he gave her back her diary. If the Universe Reset after Big Bang II, then she shouldn't have ended up there.
What's puzzling you about it? In the same episode, we saw the Doctor whizzing about through time, and altering the past so it matched the future. For example, after Amelia is already there at the museum, he discovers he needs to leave her a note so she'll go there to meet the guy standing in front of her.
Yeah sure, River doesn't have the VM *at that moment* but she gets it later, and could come back and drop off the book, which brings the Doctor back, which brings the VM back.
Timey wimey.