[Pugazh]

I have created a non uniform area rectangular body. I want a structured mesh with finer grid size near the walls, I have done premesh and converted it to unstruct mesh. But exactly at the midplane I am getting this kind of mesh (attached in the image). Other than the midplane i am getting uniform structured mesh without any irregularities. May i know the reason. I need a uniform mesh in the midplane which gives me non symmetrical results in CFX. What am i doing wrong?