Abaqus - I have problems with meshing?

Hi,

I am trying to mesh my model and I want to have one element in the Z-direction and I use seed edge and put 'number of elements'=1, but after clicking mesh part instance Abaqus adds another element in this dir​​​​​​​ection. How can I fix this? Scree​​​​​​​nshots of my model and mesh are below. Thanks in ​​​​​​​

Abaqus ​​​​​​​