I read your post and it seems like you are having the same problem as mine. I started to optimized my site last three months. My keyword ranked as number one in the search engine. Then, I decided to stop optimizing it for I have already gained a good result. However, last week, I checked my ranking again and was shocked that my keyword was nowhere to be found. My website does not appear to be penalized but I wonder why my keyword lost in the rankings. I cannot find it anywhere. I tried to search it until I reached the last page of google but I can’t still find it. Any idea about this? Thanks.
-susci