[Talk-us] How do I fix dupe nodes in waterways?

[Nathan Edgars II]

http://www.openstreetmap.org/browse/way/136738748
http://www.openstreetmap.org/browse/way/136765496

I'm creating waterway relations for major rivers and came across this 
import, which has a whole bunch of dupes. I run the JOSM validator and 
all it gives is "Duplicate nodes in two un-closed ways - Duplicated 
nodes" with a grayed-out Fix button. Manually selecting each one and 
hitting M is an option, but there are 648 on just this one river.