[My girl Lulu]

I was watching Lulu chew on a toy and noticed something funny about her teeth. Her bottom, I guess you would call, them canine teeth. She has two sets one set is inside the other. I hope that makes some type of sense. I tryed to take a picture but couldn't get her to stay still! Well I guess I am asking if anyone has heard of this before and is there something wrong??
I appreciate any feed back!