Well, I went home and started trying some of the suggestions and was still having the problem. One thing did work for me....as you can see in one of the screenshots that i attached above in this tutorial it had us build a placeholder wall in the middle of this room. When making the curves i've hidden everything else and went to FRONT view and held down V when clicking to snap the vertices to the placeholder vertices and then when laying down the arch points i've held X to snap to the grid. When i didn't use the placeholder wall and just used the grid to snap to, finished off the wall, duplicated and lofted with no problem. Why would that be? Shouldn't I be able to use vertices of another wall to snap my CV Curve Tool vertices to when drawing a new wall?