I was reading around as I have been doing awhile when I'm in my information overload insomnia mode and I came across someone's post. Basically what it said that gmail does some "browser hijacking" as it will alter the rankings for a keyword based on your preferences when logged in your gmail account. ie If you're logged into gmail and visit your website through google then it will move up the search results for you.
I got curious and tried it out. While I was logged in gmail I was at #10 for my keyword. When I logged out I was at #1.
This simply makes no sense to me and as I am not bright enough to shed light on this phenomenon, I will pass on this responsibility to you warriors.