I have been using an article marketer application to get higher google rankings for certain keywords for my website. I focused on two keywords - "proxy website" and "secret proxy". Although I have around 1000 articles each for both of these keywords and both appear in the anchor text of the articles, the google rankings for both these keywords has dropped. They have dropped completely. Why is this do you think? Do you think it's because of an inbalance of articles as they just focus on two keywords? Do you think I should create more articles focusing on other keywords to restore a balance? If so how many more keywords do you think?