Oh no, those lightning blue eyes Harry kept glancing at in the broken mirror of Sirius's belonged to Dumbledore's brother Aberforth.
How Harry and Dumbledore were able to talk at that King's Cross limbo place was by Voldemort casting the Killing Curse at Harry in the forest, destroying the Horcrux in Harry he unintentionally made the night he murdered his parents. Also, remember back at the end of Goblet of Fire (the book) when Dumbledore had that "gleam of triumph" in his eyes after discovering Voldemort had used Harry's blood to regenerate his self back to human. As long as Harry's blood runs through Voldemort's veins, he can never successfully kill Harry. So taking both of those facts into account, I'm understanding the wand acting on it's own accord a little better now.
And btw, Deathly Hallows (despite some of it's flaws and lackluster epilogue) along with Half-Blood Prince are hands down the best ones in the entire series. Hopefully with the film adaptation being split as two movies, they'll be able to make much needed improvements on the very few flaws found in the book.