Is it normal I don't like my dads fiance as much as the past her?

I think a lot of people feel this way and go through this.
That sounds very, very annoying, and I would be pissed too. It is very normal to feel the way you do. Someone is moving into your house, into your LIFE, and taking more control then you feel is appropriate.
I think you should ask your dad to sit down with you, just you and him, and have a very honest discussion about how you feel. Tell him how you want him to be happy, but how you also want to feel happy with the new arrangement.
It's your life too!