Please englighten me!
"American citizen - this only means that at least one of the birth parents was an American and that the indivicual was naturalized, if not born in the US. These alo include immigrants who have been naturalized citizens. You can be considered an American citizen if you have dual citizenship with another country... "
It isn't if one parent was a citizen AND you were naturalized. It's one or the other, or you were born here. In any case, however it happened, you are a citizen or you aren't.
"Native Born Citizen - this means that an individual, in addition to having at least one parent who is an American citizen and you were born on US soil (including territories and American bases)."
Again, not both. If you were born here you are a citizen, regardless of whether your parents were. That's the law.
"Natural Born Citizen - this is an individual born of two American parents, whether the parents were native born or were foreign born and then naturalized..."
The citizenship of the parents does not matter. What matters is whether you are a citizen by birth. That can happen because one of your parents is a citizen, or because you are born here. If you were a citizen at birth then you are a "natural born citizen".