is it possible that the bounty that i joined is a fake one.??
Yes it is,lot of icos end that way.
Is it possible that i can lost my claims during the campaign period?
is possible that you and other tons of people lost their claims if the ico is a scam.
This is a hard way to learn, but at end you get the lesson, if you will junt to a ICO, read all you can about the business and who is behind it, that help a lot before start wasting your time on a scam.