Super Hatch in Island Polygons

Hi,

I am using AutoCAD Map 3D 2013 version. While using SuperHatch (with Block option) in island polygons, the command creates 2 extra lines. Please see the attached screenshot. The 2 yellow color lines are extra lines.

Is there any option or setvar to switch off these 2 lines or control this behaviour ?

Thanks in advance
Siva