ProConcrete Rebar Single Barset

I have a concrete deck,  the deck is curved and slopes in two different directions.  When using ProConcrete Signle RebarSet I am defining the curved sloped outline for the bars but the bars are not following the cross slope of the shape, see image attached.  As you can see from the image the rebar starts off on the shape and does follow the outline with respect to the length of the rebar but does not follow the slop.  The curved shape of the outline seems to effect the bar locations.  If I have a shape without the curve the rebar seems to follow the shape and slope better. Even when the curve is defined by vertex points the rebar still does not follow the slope of the shape sometimes.