The reason why it turned orange is because you took it off early. Bleach needs time to work and do what it is supposed to do. Darker hair has alot of red undertones in it, the first color it usually turns is usually a reddish, then orange, then golden...and so on.
Either you need to redo it, or put a darker color on (ash) to get rid of it. A semi-permant color doesn't always work...they fade out anyway. just make sure you don't get too dark of a color, then the problem will be even worse..lol

Good luck.