EC2 instances go missing when shutdown

amazon ec2amazon-web-services

I am facing a strange issue in which I lose the instance when I shut it down. I launched publicly available ami-ccb35ea5 for Centos and after running it for couple of hours I bought it down but issuing shutdown –h now command.

In the AWS Web Console, the instance went to terminated state and after few hours I was not even able to see it.

Not sure why the instances are getting disappeared.

Any help on this is highly appreciated.