You didn't specify what percentage was native American etc, if less than 5% i would ignore it as noise.
As you have said you have Asian ancestry that may be the answer to where your native American is coming from, the native Americans who crossed the land bridge from Asia to Alaska were after all Asians.
It is very difficult to tell what actually is native American as there is not a big enough reference sample yet, also the native American practice of "adopting" people from here there and everywhere and inter breeding with them can throw out spurious indications of what a native American may be.
There is also the factor that some native Americans are now thought to be the descendants of people who crossed across from Europe at the end of the last ice age, by creeping along the retreating ice sheet across the Atlantic. Needless to say your results will not say what type of native American you may be i.e. a descendant of those that came from Asia or those that came from Europe and as you will appreciate that is quite a difference.
In short there are lots of articles out there and it is very difficult to say what is actually a native American and what is not.
