My site is #36 or so for free advertising my site is caklassifieds dot com But everyday my site goes up to #4-6 for a while and then goes back during prime time hours like now I hate it. Does google do this to everyone? Is google testing my bounce rate or something. My bounce rate is pretty good. I love the traffic and it loves me but how long do ya think I'll have to wait to STAY on the front page?
8 months old is quite new into G point of view. Get some more backlinks from truted sites, more unique content and you will see it raise in serp's.
I have noticed the same phenomenom. Maybe this keeps in balance a lot of websites at once, or maybe they are just toying with you. Regardless, I think it's safe to say that the true means of this is somewhat unknown (but there are a lot of guesses!)
It's called Google Dance. You can do nothing about it, just ignore it. Focus on writing more content and building backlinks.