diff --git a/noinfo/cave_data/1623-2012-ns-09.html b/noinfo/cave_data/1623-2012-ns-09.html
index 94f9d2037..d4febfd22 100644
--- a/noinfo/cave_data/1623-2012-ns-09.html
+++ b/noinfo/cave_data/1623-2012-ns-09.html
@@ -15,8 +15,8 @@
 <unofficial_number>2012-ns-09</unofficial_number>
 
 <entrance>
-  <entranceslug>1623-2012-ns-09</entranceslug>
-  <letter></letter>
+  <entranceslug>1623-2012-ns-09b</entranceslug>
+  <letter>b</letter>
 </entrance>
 
 <explorers>Ian Walker,
diff --git a/noinfo/cave_data/1623-2012-ns-13.html b/noinfo/cave_data/1623-2012-ns-13.html
index 91f5059b7..3f4a47770 100644
--- a/noinfo/cave_data/1623-2012-ns-13.html
+++ b/noinfo/cave_data/1623-2012-ns-13.html
@@ -15,8 +15,8 @@
 <unofficial_number>2012-ns-13</unofficial_number>
 
 <entrance>
-  <entranceslug>1623-2012-ns-13</entranceslug>
-  <letter></letter>
+  <entranceslug>1623-2012-ns-13b</entranceslug>
+  <letter>b</letter>
 </entrance>
 
 <explorers>Noel Snape,
diff --git a/noinfo/entrance_data/1623-2012-ns-03a.html b/noinfo/entrance_data/1623-2012-ns-03.html
similarity index 100%
rename from noinfo/entrance_data/1623-2012-ns-03a.html
rename to noinfo/entrance_data/1623-2012-ns-03.html