Can we use the Landmass plugin blueprint with roads set to reserve for splines.

I’m creating a landscape using the Landmass plugin blueprint spline then I started to test it with a road spline and then set reserve for splines so the land attaches to the road but it will not stick to the road is there anyway it will work.

And is there a way to sculpt the landscape after using the landmass plugin if I need to fix part of the land or smooth a part for a building without using the landmass blueprint spline.