Younger sisters growing taller than their older sisters?

Its the same thing with brothers. I'm the second oldest. My older brother is a lot taller than me, and my 11 year old brother is my height and I wasn't close to that height when I was his age I'm 14. I got a 8 year old brother so he is still short but he might catch up to me because he it doesn't take much, I'm only 5'3. So yea I'm short but I'm the smartest lol.