I'm aware, but that doesn't stop it from being widely used and still comes to mind when talking about Native Americans! The thing about language it is very hard to phase out certian words with out taking generations to do so, but like I said it is being phased out but very slowly! Yes, many Americans are aware that term is incorrect but is so intertwined with our culture and language it takes a lot of work to completely get rid of it with out having slip up and say the wrong word by accident or forgetting that is not the correct terms.
So just give it a little time and patience and no one would be using that term anymore!
"Your goal in life should be to make your past self envious of your current self"
"Be kind, please rewind" - an ancient proverb