#2 - Oct. 10, 2012, 3:20 p.m.
The buff that makes you get 50% more valor points applies to all characters on the realm you're playing as long as
one character in that realm hits the 1000 valor points weekly cap. Since that cap resets on Wednesdays, it's normal that it's no longer there. It'll be reapplied to your character as soon as you hit the 1000 valor weekly cap again.
In short, the Valor of the Ancients buff is meant to help your other characters on that same realm to get to the valor cap quickly.