Inroads SS10 - Surface Creation - Void drape Removes surface

I am trying do a parking lot surface. As a preliminary am putting Islands into void. There are Two Islands in the surface. When i add them tosurface as Void drape features, they take off the entire surface.

I am using Inroads SS10. I am creating surface using Civil tools .

Thanks

Adding the shown two islands remove the entire surface. Other islands work fine

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