diff --git a/core/models/caves.py b/core/models/caves.py
index 0001814..bae8eb5 100644
--- a/core/models/caves.py
+++ b/core/models/caves.py
@@ -74,30 +74,32 @@ class CaveAndEntrance(models.Model):
     def __str__(self):
         return str(self.cave) + str(self.entrance_letter)
 
+# class CaveSlug(models.Model):
+# moved to models/logbooks.py to avoid cyclic import problem
 
 class Cave(TroggleModel):
     # too much here perhaps,
-    official_name = models.CharField(max_length=160)
     area = models.ManyToManyField(Area, blank=True)
+    depth = models.CharField(max_length=100, blank=True, null=True)
+    description_file = models.CharField(max_length=200, blank=True, null=True)
+    entrances = models.ManyToManyField("Entrance", through="CaveAndEntrance")
+    equipment = models.TextField(blank=True, null=True)
+    explorers = models.TextField(blank=True, null=True)
+    extent = models.CharField(max_length=100, blank=True, null=True)
+    filename = models.CharField(max_length=200)
     kataster_code = models.CharField(max_length=20, blank=True, null=True)
     kataster_number = models.CharField(max_length=10, blank=True, null=True)
-    unofficial_number = models.CharField(max_length=60, blank=True, null=True)
-    entrances = models.ManyToManyField("Entrance", through="CaveAndEntrance")
-    explorers = models.TextField(blank=True, null=True)
-    underground_description = models.TextField(blank=True, null=True)
-    equipment = models.TextField(blank=True, null=True)
-    references = models.TextField(blank=True, null=True)
-    survey = models.TextField(blank=True, null=True)
     kataster_status = models.TextField(blank=True, null=True)
-    underground_centre_line = models.TextField(blank=True, null=True)
-    notes = models.TextField(blank=True, null=True)
     length = models.CharField(max_length=100, blank=True, null=True)
-    depth = models.CharField(max_length=100, blank=True, null=True)
-    extent = models.CharField(max_length=100, blank=True, null=True)
+    notes = models.TextField(blank=True, null=True)
+    official_name = models.CharField(max_length=160)
+    references = models.TextField(blank=True, null=True)
     survex_file = models.CharField(max_length=100, blank=True, null=True) # should be a foreign key
-    description_file = models.CharField(max_length=200, blank=True, null=True)
+    survey = models.TextField(blank=True, null=True)
+    underground_centre_line = models.TextField(blank=True, null=True)
+    underground_description = models.TextField(blank=True, null=True)
+    unofficial_number = models.CharField(max_length=60, blank=True, null=True)
     url = models.CharField(max_length=200, blank=True, null=True)
-    filename = models.CharField(max_length=200)
 
     # class Meta:
     #    unique_together = (("area", "kataster_number"), ("area", "unofficial_number"))
@@ -267,15 +269,6 @@ class EntranceSlug(models.Model):
 
 
 class Entrance(TroggleModel):
-    name = models.CharField(max_length=100, blank=True, null=True)
-    entrance_description = models.TextField(blank=True, null=True)
-    explorers = models.TextField(blank=True, null=True)
-    map_description = models.TextField(blank=True, null=True)
-    location_description = models.TextField(blank=True, null=True)
-    lastvisit = models.TextField(blank=True, null=True)
-    approach = models.TextField(blank=True, null=True)
-    underground_description = models.TextField(blank=True, null=True)
-    photo = models.TextField(blank=True, null=True)
     MARKING_CHOICES = (
         ("P", "Paint"),
         ("P?", "Paint (?)"),
@@ -286,25 +279,34 @@ class Entrance(TroggleModel):
         ("S?", "Spit (?)"),
         ("U", "Unmarked"),
         ("?", "Unknown"),
-    )
-    marking = models.CharField(max_length=2, choices=MARKING_CHOICES)
-    marking_comment = models.TextField(blank=True, null=True)
+    )    
     FINDABLE_CHOICES = (("?", "To be confirmed ..."), ("S", "Coordinates"), ("L", "Lost"), ("R", "Refindable"))
+    alt = models.TextField(blank=True, null=True)
+    approach = models.TextField(blank=True, null=True)
+    bearings = models.TextField(blank=True, null=True)
+    cached_primary_slug = models.CharField(max_length=200, blank=True, null=True)
+    easting = models.TextField(blank=True, null=True)
+    entrance_description = models.TextField(blank=True, null=True)
+    exact_station = models.TextField(blank=True, null=True)
+    explorers = models.TextField(blank=True, null=True)
+    filename = models.CharField(max_length=200)
     findability = models.CharField(max_length=1, choices=FINDABLE_CHOICES, blank=True, null=True)
     findability_description = models.TextField(blank=True, null=True)
-    alt = models.TextField(blank=True, null=True)
-    northing = models.TextField(blank=True, null=True)
-    easting = models.TextField(blank=True, null=True)
+    lastvisit = models.TextField(blank=True, null=True)
     lat_wgs84 = models.TextField(blank=True, null=True)
+    location_description = models.TextField(blank=True, null=True)
     long_wgs84 = models.TextField(blank=True, null=True)
-    tag_station = models.TextField(blank=True, null=True)
-    exact_station = models.TextField(blank=True, null=True)
-    other_station = models.TextField(blank=True, null=True)
+    map_description = models.TextField(blank=True, null=True)
+    marking = models.CharField(max_length=2, choices=MARKING_CHOICES)
+    marking_comment = models.TextField(blank=True, null=True)
+    name = models.CharField(max_length=100, blank=True, null=True)
+    northing = models.TextField(blank=True, null=True)
     other_description = models.TextField(blank=True, null=True)
-    bearings = models.TextField(blank=True, null=True)
+    other_station = models.TextField(blank=True, null=True)
+    photo = models.TextField(blank=True, null=True)
+    tag_station = models.TextField(blank=True, null=True)
+    underground_description = models.TextField(blank=True, null=True)
     url = models.CharField(max_length=200, blank=True, null=True)
-    filename = models.CharField(max_length=200)
-    cached_primary_slug = models.CharField(max_length=200, blank=True, null=True)
 
     class Meta:
         ordering = ["caveandentrance__entrance_letter"]
@@ -393,6 +395,9 @@ class Entrance(TroggleModel):
         return res
 
     def slug(self):
+        """Returns the first slug with primary=True that it can find,
+        if there are none with primary=True, then it returns the first slug it finds
+        """
         if not self.cached_primary_slug:
             primarySlugs = self.entranceslug_set.filter(primary=True)
             if primarySlugs:
diff --git a/core/views/caves.py b/core/views/caves.py
index af59bc9..81a1e8e 100644
--- a/core/views/caves.py
+++ b/core/views/caves.py
@@ -483,7 +483,15 @@ def ent(request, cave_id, ent_letter):
         },
     )
 
-
+def cave_debug(request):
+    ents = Entrance.objects.all()
+    #slugs = self.entranceslug_set.filter()
+    return render(
+        request,
+        "cave_debug.html",
+        {"ents": ents},
+    )
+    
 # def entranceSlug(request, slug):
 # '''This seems to be a fossil, but I am not sure...
 # '''
diff --git a/parsers/caves.py b/parsers/caves.py
index f12cd84..feb8fbb 100644
--- a/parsers/caves.py
+++ b/parsers/caves.py
@@ -373,7 +373,8 @@ def readentrance(filename):
                 # need to cope with duplicates
                 message = f" ! FAILED to get precisely one ENTRANCE when updating using: cave_entrance/{filename}"
                 DataIssue.objects.create(parser="caves", message=message, url=f"/cave/{slug}/edit/")
-                kents = EntranceSlug.objects.all().filter(entrance=e, slug=slug, primary=primary)
+                # kents = EntranceSlug.objects.all().filter(entrance=e, slug=slug, primary=primary)
+                kents = EntranceSlug.objects.all().filter(entrance=e, slug=slug)
                 for k in kents:
                     message = " ! - DUPLICATE in db. entrance:" + str(k.entrance) + ", slug:" + str(k.slug())
                     DataIssue.objects.create(parser="caves", message=message, url=f"/cave/{slug}/edit/")
@@ -509,7 +510,7 @@ def readcave(filename):
                         newArea.save()
                     areas_xslug[area_slug] = newArea
                 c.area.add(newArea)
-            primary = True
+            primary = True # this sets the first thing we find to be primary=True and all the others =False
             for slug in slugs:
                 if slug in caves_xslug:
                     cs = caves_xslug[slug]
diff --git a/templates/cave_debug.html b/templates/cave_debug.html
new file mode 100644
index 0000000..be0ce20
--- /dev/null
+++ b/templates/cave_debug.html
@@ -0,0 +1,36 @@
+{% extends "base.html" %}
+{% block title %}DEBUG page
+<!-- cave_debug.html - this text visible because this template has been included -->
+{% endblock %}
+
+{% block content %}
+
+<h2 id="cmult">Entrances</h2>
+<table>
+<tr><th>ent</th>
+<th>cached_primary_slug</th>
+<th>N slugs</th>
+<th>slugs</th>
+</tr>
+{% for ent in ents %}
+<tr>
+  <td>
+     {{ent}}
+  </td>
+  <td>
+    {{ent.cached_primary_slug}}
+  </td>
+    <td>
+    {{ent.entranceslug_set.all|length }}
+  </td>
+    <td>    
+    {% for s in ent.entranceslug_set.all %}
+    {{s.slug}},
+    {% endfor %}
+  </td>
+
+{% endfor %}
+</table>
+
+
+{% endblock %}
diff --git a/templates/editcave.html b/templates/editcave.html
index 75033b3..640412a 100644
--- a/templates/editcave.html
+++ b/templates/editcave.html
@@ -8,7 +8,7 @@
 {% include 'html_editor_pop_ups.html' %}
 <h2>{{message}}</h2>
 <form action="" method="post">{% csrf_token %}
-    <table>{{ form }}<!--1-->{{caveAndEntranceFormSet}}<!--2--></table>
+    <table>{{ form }}<!-- begin caveAndEntranceFormSet-->{{caveAndEntranceFormSet}}<!--end caveAndEntranceFormSet--></table>
     <p><input type="submit" value="Submit" /></p>
 </form>
 
diff --git a/urls.py b/urls.py
index e257832..fbee871 100644
--- a/urls.py
+++ b/urls.py
@@ -5,7 +5,7 @@ from django.urls import include, path, re_path
 from troggle.core.views import statistics, survex
 from troggle.core.views.auth import expologin, expologout
 from troggle.core.views.caves import (cave3d, caveEntrance, caveindex,
-                                      cavepage, caveQMs, edit_cave,
+                                      cavepage, caveQMs, edit_cave, cave_debug,
                                       edit_entrance, get_entrances, qm)
 from troggle.core.views.drawings import dwgallfiles, dwgfilesingle
 from troggle.core.views.editor_helpers import image_selector, new_image_form
@@ -133,6 +133,7 @@ trogglepatterns = [
     re_path(r'^getEntrances/(?P<caveslug>.*)', get_entrances, name = "get_entrances"), # used internally ?
 
 #   Cave description pages
+    path('cave_debug',  cave_debug,  name="cave_debug"), 
     re_path(r'^newcave/$', edit_cave, name="newcave"),
     re_path(r'^cave/3d/(?P<cave_id>[^/]+)$', cave3d, name="cave3d"),