We have long understood the flaw in the software you use for course design. Have the developer fix the tool instead of making wrong edits to the map. OSM doesn't use splines, but polygons, by the way. Knowingly making wrong edits to the map is vandalism. I will ask you just once to under no circumstances add "lollipops" to the map. I am happy to have any number of other users and/or mods reiterate the same if you won't take it from me.