Anyone else have the booster type carseat for thier 2yr old???

I have the first one but my daughter slouches in it. Ive tried messing around with it but she is very uncomfortable. The bucket part pushes against her private area. She complains about it hurting all the time.=/ which is when I started becoming concerned. We tried putting it rear again which takes some pressure off but her legs are so long they bunch up. Her knees arw literally in her face when rear faced.

She seems to sit up straight and doesnt complain at all when in a booster type. I didnt think her age(2yrs) could use booster seats but she meets the weigh and height requirements. She is very tall and has a long torso. Im considering purchasing the second carseat.