Osnaps connecting to planes not curves?

Not sure what I did or if something is otherwise messed up but when I go to move a curve using an osnap the point goes to a plane rather than the curve. I don’t have a clue as to what is going on. Assistance would be appreciated.[Uploading: cupola2.3dm…]

Your turned on Project in the Osnap menu, so all points are projected to the CPlane.

Thanks John, Must have hit it by mistake. I was clueless and that was it. Don’t know what that is used for and will have to look it up. Much appreciated.