Moses 3D Diffraction Model has panels with >4 corners

Hi all,
I want to perform 3D diffraction analysis of 0 speed ship in Moses. I have developed the panel model of the ship using &SURFACE from 2 blocks of main hull and fwd bulbous bow until aft section. Each block is defined by PLANEs of CARTesian. The blocks are UNIONed then previous blocks are DELETEd.

The panel output (model) shows that several panel are consist of >4 corners. How did that happened and how to fixed these >4 corners panel?
I have run the 3D diffraction using the resulted panel output. Are the Motion Response Operators resulted from this panel model valid?

Thanks for responding.
_fahrozi


Hull.zip