diff --git a/brozzler/frontier.py b/brozzler/frontier.py
index c9e0e9b..9f06115 100644
--- a/brozzler/frontier.py
+++ b/brozzler/frontier.py
@@ -96,11 +96,12 @@ class RethinkDbFrontier:
                         ["ACTIVE",rethinkdb.minval],
                         ["ACTIVE",rethinkdb.maxval],
                         index="sites_last_disclaimed")
-                    .order_by(index="sites_last_disclaimed").limit(1)
+                    .order_by(index="sites_last_disclaimed")
                     .filter(
                         (rethinkdb.row["claimed"] != True) |
                         (rethinkdb.row["last_disclaimed"]
                             < rethinkdb.now() - 2*60*60))
+                    .limit(1)
                     .update({"claimed":True,"last_claimed_by":worker_id},
                         return_changes=True)).run()
             self._vet_result(result, replaced=[0,1], unchanged=[0,1])
diff --git a/brozzler/site.py b/brozzler/site.py
index af030da..5fd2396 100644
--- a/brozzler/site.py
+++ b/brozzler/site.py
@@ -43,6 +43,9 @@ class Site(brozzler.BaseDictable):
                 repr(self.proxy), self.enable_warcprox_features,
                 self.ignore_robots, self.extra_headers, self.reached_limit)
 
+    def __str__(self):
+        return "site-%s-%s" % (self.id, self.seed)
+
     def _to_surt(self, url):
         hurl = surt.handyurl.parse(url)
         surt.GoogleURLCanonicalizer.canonicalize(hurl)