diff --git a/cave_data/1623-136.html b/cave_data/1623-136.html
index 520458b54..7cc97762a 100644
--- a/cave_data/1623-136.html
+++ b/cave_data/1623-136.html
@@ -41,7 +41,7 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
 <entrance>
   <entranceslug>1623-136a</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
   <!-- DEBUG  1623-136+1623-136a 'Z' == -->
-  <letter></letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
+  <letter>a</letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
 </entrance>
 
 <entrance>
diff --git a/cave_data/1623-161.html b/cave_data/1623-161.html
index 1cae7b0d5..7e16a66da 100644
--- a/cave_data/1623-161.html
+++ b/cave_data/1623-161.html
@@ -38,11 +38,6 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
 <kataster_number>161</kataster_number> <!-- (Either this or unofficial_number is required). Official number in Austrian kataster if one has been allocated  -->
 <unofficial_number></unofficial_number><!-- (Either this or kataster_number is required). Initial temporary cave ID used until kataster number is allocated e.g. '2012-DD-01'-->
 
-<entrance>
-  <entranceslug>1623-161d</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
-  <!-- DEBUG  1623-161+1623-161d 'Z' == -->
-  <letter></letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
-</entrance>
 
 <entrance>
   <entranceslug>1623-161a</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
@@ -62,6 +57,12 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
   <letter>c</letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
 </entrance>
 
+<entrance>
+  <entranceslug>1623-161d</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
+  <!-- DEBUG  1623-161+1623-161d 'Z' == -->
+  <letter>d</letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
+</entrance>
+
 <entrance>
   <entranceslug>1623-161e</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
   <!-- DEBUG  1623-161+1623-161e 'Z' =e= -->
diff --git a/cave_data/1623-2023-MG-03.html b/cave_data/1623-2023-MG-03.html
index ceaa33a4c..8c206cc76 100644
--- a/cave_data/1623-2023-MG-03.html
+++ b/cave_data/1623-2023-MG-03.html
@@ -38,12 +38,6 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
 <kataster_number></kataster_number> <!-- (Either this or unofficial_number is required). Official number in Austrian kataster if one has been allocated  -->
 <unofficial_number>2023-mg-03</unofficial_number><!-- (Either this or kataster_number is required). Initial temporary cave ID used until kataster number is allocated e.g. '2012-DD-01'-->
 
-<entrance>
-  <entranceslug>1623-2023-mg-03c</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
-  <!-- DEBUG  1623-2023-mg-03+1623-2023-mg-03c 'Z' == -->
-  <letter></letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
-</entrance>
-
 <entrance>
   <entranceslug>1623-2023-mg-03a</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
   <!-- DEBUG  1623-2023-mg-03+1623-2023-mg-03a 'Z' =a= -->
@@ -56,6 +50,12 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
   <letter>b</letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
 </entrance>
 
+<entrance>
+  <entranceslug>1623-2023-mg-03c</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
+  <!-- DEBUG  1623-2023-mg-03+1623-2023-mg-03c 'Z' == -->
+  <letter>c</letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
+</entrance>
+
 <entrance>
   <entranceslug>1623-2023-mg-03d</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
   <!-- DEBUG  1623-2023-mg-03+1623-2023-mg-03d 'Z' =d= -->