Ensure the admin (and profile) views of a user's blog feed url registration status is looking at the correct entry
Sometimes when a user alters their blog feed url for a given course, multiple records are created in CouchDB - the proliferation of records results in strange behaviour when trying to verify that a user's feed is in fact registered here's an example.
To fix this, I need to ensure that there never more than one instance of a couchdb feed registration for a user + course combination.