There are a couple things I don't get though, that maybe someone can help me out with.
Snape puts a phony sword of Gryffindor in Bellatrix's vault, and gets the real one to Harry. Ron then uses the real one to destroy the locket, but then Harry barders it to Griphook to get into Bellatrix's vault at Gringott's.
Harry gets the Hufflepuff cup, but Griphook makes off with the sword.
Then, at the end, when the Sorting Hat comes to Neville, Neville pulls the sword out and uses it to cut off Nagini's head.
I don't get it....
Did Griphook accidentally make off with the phony sword in the midst of all the chaos? Does the real sword go to whomever needs it, through the Sorting Hat? Anyone got this figured out?
And while I'm asking questions about stuff I don't get, how did Harry determine that one of the Horcrux's would be in Bellatrix's vault? That seemed a little...random, given the placement of the other Horcruxes.