diff --git a/anatomy/models.py b/anatomy/models.py
index c6d157ab..3e80b5fd 100644
--- a/anatomy/models.py
+++ b/anatomy/models.py
@@ -411,7 +411,7 @@ class Exam(ExamBase):
     examcollection = models.ForeignKey(ExamCollection, blank=True, null=True, on_delete=models.SET_NULL, related_name="anatomy_exams")
 
     def get_exam_json(self, based=True):
-        questions = self.exam_questions.all()
+        questions = self.get_questions()
 
         exam_questions = defaultdict(dict)
 
diff --git a/atlas/models.py b/atlas/models.py
index 4f83e0c4..50aff24b 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -426,6 +426,7 @@ class Case(models.Model, AuthorMixin):
         return json.dumps(self.get_viva_details())
 
 
+
 def extract_image_dicom_json_from_ds(ds, url, image_index):
     to_keep = [
         "Columns",
@@ -866,6 +867,13 @@ class CaseCollection(ExamOrCollectionGenericBase):
         }
 
 
+    def order_cases(self): 
+        """Modifies the casedetail sort_order to sequentially order the cases"""
+        for n, c in enumerate(self.casedetail_set.all().order_by("sort_order")):
+            c.sort_order = n
+            c.save()
+
+
 class SeriesDetail(models.Model):
     case = models.ForeignKey(Case, on_delete=models.CASCADE)
     series = models.ForeignKey(Series, on_delete=models.CASCADE)
diff --git a/atlas/templates/atlas/collection_detail.html b/atlas/templates/atlas/collection_detail.html
index 2dbc3942..8882deec 100644
--- a/atlas/templates/atlas/collection_detail.html
+++ b/atlas/templates/atlas/collection_detail.html
@@ -10,9 +10,9 @@
     </div>
     <h3>Cases</h3>
     <ol id="full-question-list" class="sortable">
-        {% for case in cases %}
-            <li data-question_pk={{case.pk}}><a href="{% url 'atlas:collection_case_view' pk=collection.pk case_number=forloop.counter0 %}">Case {{forloop.counter}}</a>
-                : {{case.title}}
+        {% for casedetail in casesdetails %}
+            <li data-question_pk={{case.pk}}><a title="sort_order: {{casedetail.sort_order}}" href="{% url 'atlas:collection_case_view' pk=collection.pk case_number=forloop.counter0 %}">Case {{forloop.counter}}</a>
+                : {{casedetail.case.title}}
             </li>
 
         {% endfor %}
diff --git a/atlas/views.py b/atlas/views.py
index f84b52f8..f37c0283 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -387,8 +387,12 @@ def add_case_to_collection(request, collection_id):
 
     if request.method == "POST":
         case = get_object_or_404(Case, pk=request.POST["case"])
+
+        if case in collection.cases.all():
+            return HttpResponse("Case already in collection")
         print(case)
         collection.cases.add(case)
+        collection.order_cases()
         return HttpResponse("Case added to collection")
 
 
@@ -1380,12 +1384,13 @@ def collection_viva_series(request, pk, series_id):
 def collection_detail(request, pk):
     collection = get_object_or_404(CaseCollection, pk=pk)
 
-    cases = collection.cases.all().order_by("casedetail__sort_order")
+    #cases = collection.cases.all().order_by("casedetail__sort_order")
+    casedetails =  CaseDetail.objects.filter(collection=collection).order_by("sort_order")
 
     return render(
         request,
         "atlas/collection_detail.html",
-        {"collection": collection, "cases": cases, "can_edit": True},
+        {"collection": collection, "casesdetails": casedetails, "can_edit": True},
     )
 
 
diff --git a/generic/models.py b/generic/models.py
index 94b2ee53..ccb37a47 100644
--- a/generic/models.py
+++ b/generic/models.py
@@ -828,8 +828,15 @@ class ExamBase(ExamOrCollectionGenericBase):
         super().save(*args, **kwargs)
 
     def get_questions(self):
+        """Returns a list of questions in the exam in the correct order"""
         return self.exam_questions.all().order_by("examquestiondetail__sort_order")
 
+    def order_questions(self): 
+        """Modifies the examquestiondetail sort_order to sequentially order the cases"""
+        for n, c in enumerate(self.examquestiondetail_set.all().order_by("sort_order")):
+            c.sort_order = n
+            c.save()
+
     def get_exam_stats(self, name=True):
         if self.stats_candidates < int(4):
             return f"- Candidates: {int(self.stats_candidates)} (too few to generate stats)"
@@ -889,11 +896,11 @@ class ExamBase(ExamOrCollectionGenericBase):
         return time_limit.strip()
 
     def get_question_index(self, question):
-        return list(self.exam_questions.all()).index(question)
+        return list(self.get_questions()).index(question)
 
     def get_question_by_index(self, index: int):
         # There must be a better way to do this
-        return list(self.exam_questions.all())[index]
+        return list(self.get_questions)[index]
 
     def get_cid_user_score(self, cid_user):
         c = "c/" + str(cid_user)
diff --git a/rapids/models.py b/rapids/models.py
index 7c404c9b..3117c7d4 100644
--- a/rapids/models.py
+++ b/rapids/models.py
@@ -667,7 +667,7 @@ class Exam(ExamBase):
         return len(normal)
 
     def get_exam_json(self, based=True):
-        questions = self.exam_questions.all()
+        questions = self.get_questions()
 
         exam_questions = defaultdict(dict)