Wands and other confusion about Deathly Hallows plotline

[irenek90]

No: HPFGUIDX 174312

While I enjoyed a lot of aspects of the three hallows plotline, in 
the end, there was a lot of confusion about the wand situation and 
also, the hallows almost seem like a pointless diversion (though I'm 
hoping someone can convince me otherwise). Here are a few 
questions/concerns:

1. The blood of Harry in Voledemort was what saved Harry in their 
first confrontation in the forest, so the role of uniting the three 
hallows or the wand issue never came into play.

2. Also, if, for argument's sake, the drop of blood was never a 
factor in keeping Harry alive, how could the wand kill Harry in the 
forest if he was its master? (I thought the wand wouldn't kill it's 
own master.) I feel this takes away some of the power of the blood 
protection.

3. If Harry's blood in Voldemort protected him from death, then why 
does the "master of the wand" issue even matter in the second 
confrontation in the Great Hall?