Panel loads vs object loads

[aeromaner]

Hello,
When I change the reference plane (on the options tab) Hypersizer optains new loads and moments as object loads. I take it normally to change moments but why do inplane loads change (NX,NY,NXY)?
In nastran, when we use to element offset (ZOFFS), forces/moments don't need to modify because reference plane coincident with laminate mid plane(without property offset, Z0).
How does Hypersizer calculate new loads (NX,NY,NXY,MX,MY,MXY)_object when using offset or changing reference plane?

You can access the details about the offset definition from the link below.
http://www.aersys.com/AERSYS-7016.pdf

Thanks