Maybe you hit the Caffeine data center.
Few days back when I checked site:mysite.com in Google. It shows 700 indexed pages. Yesterday morning it shows 3,800 indexed pages and yesterday night it was showing 696 indexed pages..
What's going on with Google?? Does anyone else seeing this situation?
I have also experienced similar things with my websites.
I tried site:mysite.com in
Google Data Centers Analysis Tool
and some were not working, Most were reporting 3,800+ and only one was reporting 700... May be that one is of caffeine...
I think Google wants to be unpredictable
I've been noticing this as well, and so have a handful of members on AdminAddict (Big increase in number of indexed pages - AdminAddict).
Perhaps it does indeed have something to do with Google Caffeine going live.