Eliminating an extra contour cut

How are you creating your contour for cutting? It should be made from just the black oval with the bubble shapes, not the whole design.

 

In Corel Id make a boundry and then do an outside contour from that to offset it and leave white. Or convert the outer black circle to an object, copy it, the top one no fill then hairline cut contour and the bottom one stroke 4-6 pts for a bleed if you didn't want a white border.

 

So what you're saying is that the rectangle of the photo of the car goes beyond the black shape that marks the outline of the decal. But why are you including the photo of the car when designating your cut contour? Just make the cut contour from the black shape. Or power clip the picture of the car inside the white shape (place it in the white shape as a clipping mask).