It is my first post in spite of the fact that I am reading WebmasterWorld often.
I would like to share my experience with other people and highly appreciate any help from experts.
6 month ago I made a travel country guide site. It was successfully indexed by Google and after first month I had 90% of all visitors from Google. Step by step I was adding new content, placing links in directories. Almost all pages were indexed by Google (>100). After the first update my site had PR=3.
But after 2-3 months the ratio of my site visitors became 70% MSN and 30% Google and the overall number of visitors increased slightly. After the second update PR didn't change (domain PR=3, but internal pages PR=0 or PR=1, unfortunately didn't notice internal pages PR before second update). One more month after less than 10% of all visitors came from Google, due to it overall number of visitors decreased slightly (90% from MSN, Yahoo and increasing a little). And more than half of all pages of my site were found in Supplemental results (even index page was supplemental!). Cashed versions of my site disappeared from many datacenters in spite of the fact that I can find it through site:my_site. And other datacenters are still cashing my site.
My site has a little number of external links, internal pages are linked well. Titles and content is different on every page. Not long ago I made redirect 301 from www to non-www but the results were almost same, so I don't think it was site doubling.
Here is my story. What do you think? Is it the way sandbox is working or something goes wrong with my site?
The number of visitors from MSN is increasing nevertheless and there are no sufficient changes in my site.
I would appreciate any help and advice.
P.S. I have another old enough site of same subject which has >1000 hosts per day, so I have some experience in this field.