Your position in Google for any specified search never stays that way for too long. The landscape is constantly changing. Sometimes it’s new competitors, sometimes it’s old ones who have done something new, and sometimes it’s neither!
From time to time Google changes the formula they use, and the Sydney Morning Herald reports they have just done it again.
So don’t be too surprised to see your ranking change from time to time, in fact you can safely expect it to happen!
Contact us if any such changes concern you.