So you are saying he was a citizen at birth because he was born in Hawaii, but is not a citizen now—and his name is Barry Soetoro. Makes sense.
These are the main questions that need answers:
Name of mother?
Name of father?
Birthplace?
Nationality at birth?
Nationality now?
Name at birth?
Name now?
He probably restored his citizenship at some point, probably when he went into politics, he was entitled to do that. But, that left quite a paper trail that was quite problematic for a potential Presidential candidate. Lots of records needed to go missing. That’s what happened.