My outline isn't complete, either. Like yours, mine will not be "complete", probably until the end of November! But, I usually try to put down what I have. I know the resolution, so I add the ending, too, but I only know the story, at this point, to a certain point. Sometimes, even when I have a full outline, it changes as I write it. I think you just come to expect that after a while.
Good Luck All!
Beck