The fairway, which has an intermediate cut of rough on it's edge, surrounds the green. It doesn't actually "share" the edge of the green. I suppose the more technically correct way to draw it would be to not share the nodes at all, but  keep the fairway nodes separate by about 1 foot, but OSM doesn't play nice with nodes that close together and will Inadvertently pull the nodes together and/or cause the splines to intersect. 

If they do not have the fairway/intermediate rough surround then the fairway would share the nodes on the "inside" of the green instead of surrounding it. Look at my edits on the course just to the W and NW (Vintage Club Mountain Course) for an example of that.

All golf holes should be a total of three nodes (unless there is a double dogleg par 5 with a blind approach shot which may have 4 nodes). I can move the middle waypoint node on par 3 holes to be in the fairway, but that just boils down to personal preference.
