A misunderstanding of this magnitude between siblings always feels uncomfortable to witness. It happens though. These things are sometimes unavoidable, especially when she has already made up her mind about the approach to take.
I know it's painful to have your genuine advice turned around to make you look like someone that doesn't care. However, you know what you did and you know the steps you took to get to where you are in life.
I hope she doesn't take too long to learn the importance of setting her life straight. Also, you don't have to hold yourself back from checking up on her. That's the cross of an older sibling. Hehe.
You are right. I believe she will eventually learn what I want to teach her someday.