lol I am quite similar to yours 
hmm yeah I am Biracia... because a whole lot of my ancestors are mixed because of colonizers from other country's coming in 
As far as I know I'm Black American and as well Polynesian, I know for sure that both sides are mixed, my Polynesian side is heavily mixed since looking at the older photos the people where very much dark but over time the skin is what you'll consider to be olive skin or much lighter ( and the history as well).
My fother had taken a DNA test and it showed that he had other
races in his blood, but it did say majority of his blood traced back to the west side of Africa (which most slave ships came in and brought them back to America), so this part on just claiming yourself as just one is hard to understand of. (hes black American)
So in the sense are we all Mixed? (well in America that is and as well countries that where invaded by other countries)
I think labels are just confusing , it is like should we go off by the land we grew up on/born from or from where are ancestors came from?
I'm labeled either as Black or African American (and Polynesian) , but I was never born in Africa so claiming myself is just hmm, but I never grew up in America but I was born on the land though, I was more connected to the island my people come of for most of my life until I moved to the states.
But anyways, sadly I wished I knew the language on my Polynesian side since it is a dyeing language and culture, wished I did payed more and taken it more seriously when I had those classes that where given to me. 
So ye... lol
thats what I feel about this 
My whole thoughts on that is very Confusing 