At first glance it looks like something was configured "funnily" on this particular maproulette challenge: https://mpr.lt/c/48636/t/234988012 points to `node/1`, which does not make sense if you ask me. I have just contacted the creator of this particular maproulette challenge, to prevent this from happening again.
I'll also go ahead and remove the superfluous tags from node 1 now.

Happy mapping! :)