Creating 'POHE'

Hi

I want to model my Ground level with POHE, but it seems that some points do not place on right elevation. I thought that POHE points could have any elevation and the surface will have some up and downs, but it seems that this element type is not suitable for this purpose. so what is the difference between panel and POHE?

In my action, the points coordination are based on my import data but the surface place down the point, i tried to show in attached image. Please tell me if there is any solution.

In attached pic, the grey box represent for point and the green vertex is for POHE surface which has been created.

Thanks