diff --git a/lib/timeline_lookup.rb b/lib/timeline_lookup.rb
index 4d4c3eac8f..1c62d879f5 100644
--- a/lib/timeline_lookup.rb
+++ b/lib/timeline_lookup.rb
@@ -11,10 +11,10 @@ module TimelineLookup
     tuples.each_with_index do |t, idx|
       next unless (idx % every) === 0
 
-      _, post_number, days_ago = t
+      days_ago = t[2]
 
       if (days_ago != last_days_ago)
-        result << [post_number, days_ago]
+        result << [idx+1, days_ago]
         last_days_ago = days_ago
       end
 
diff --git a/spec/components/timeline_lookup_spec.rb b/spec/components/timeline_lookup_spec.rb
index 8cb5edc5b2..3e1a2ef02a 100644
--- a/spec/components/timeline_lookup_spec.rb
+++ b/spec/components/timeline_lookup_spec.rb
@@ -16,6 +16,11 @@ describe TimelineLookup do
     expect(result).to eq([[1, 10], [3, 8]])
   end
 
+  it "respects holes in the post numbers" do
+    result = TimelineLookup.build([[111, 1, 10], [222, 12, 10], [333, 30, 8]])
+    expect(result).to eq([[1, 10], [3, 8]])
+  end
+
   it "respects a `max_values` setting" do
     input = (1..100).map {|i| [1000+i, i, 100-i] }