I built this site and it immediately shot to the top for these searches: Preston Hollow Realtor Highland Park Realtor Now it has been depressed and I cannot figure out why. There are tons of incoming links, unique keyword-rich content, and my other sites are doing well in other cities with more competition. Not sure what the deal is... www.berniceedelman dot com/
I checked Highland Park Realtor on Google and your site still seems to be there. I'm not an expert in the sandbox but I can tell you that Google is just very chaotic with its rankings and what not. I remember last month I was working hard to rank for a particular phrase, went from the 900's to at the highest somewhere in the 30's, and right when Feb came around I'm not even in the top 1000 for that keyword.
It is natural part I wouldnt worry about it much...your site may will be in or maybe not..its how google I guess eats new sites
Site younger then 1 year -> Google Dance ..... Keap doing seo and link building it takes time to get stable rankings
Keep working on inbound links and static pages of relevant content. These are both essentials for achieving high google rankings.