The querystring is different. The matcher here will let any URL through even if it ends in a non-relevant character (like a trailing slash). Not much you can r

The querystring is different. The matcher here will let any URL through even if it ends in a non-relevant character (like a trailing slash). Not much you can really do about it to be honest - I submit through the bookmarklet and end up submitting a fair number of dupes as well.