diff --git a/registrasion/controllers/cart.py b/registrasion/controllers/cart.py
index 9f27ab49..ad4458ea 100644
--- a/registrasion/controllers/cart.py
+++ b/registrasion/controllers/cart.py
@@ -205,12 +205,12 @@ class CartController(object):
             to_add = sum(i[1] for i in by_cat[category])
 
             if to_add > limit:
-                errors.append((
-                    category,
-                    "You may only have %d items in category: %s" % (
-                        limit, category.name,
-                    )
-                ))
+                message_base = "You may only add %d items from category: %s"
+                message = message_base % (
+                    limit, category.name,
+                )
+                for product, quantity in by_cat[category]:
+                    errors.append((product, message))
 
         # Test the flag conditions
         errs = FlagController.test_flags(
diff --git a/registrasion/controllers/item.py b/registrasion/controllers/item.py
index f2d0a2ae..9a1a9eb2 100644
--- a/registrasion/controllers/item.py
+++ b/registrasion/controllers/item.py
@@ -84,7 +84,7 @@ class ItemController(object):
                 aggregating like products from across multiple invoices.
 
         '''
-        return self._items(commerce.Cart.STATUS_PAID)
+        return self._items(commerce.Cart.STATUS_PAID, category=category)
 
     def items_pending(self):
         ''' Gets all of the items that the user has reserved, but has not yet
diff --git a/registrasion/reporting/views.py b/registrasion/reporting/views.py
index 489a8203..962b7071 100644
--- a/registrasion/reporting/views.py
+++ b/registrasion/reporting/views.py
@@ -18,6 +18,10 @@ from reports import Report
 from reports import report_view
 
 
+def CURRENCY():
+    return models.DecimalField(decimal_places=2)
+
+
 @user_passes_test(views._staff_only)
 def reports_list(request):
     ''' Lists all of the reports currently available. '''
@@ -101,7 +105,9 @@ def reconciliation(request, form):
         invoice__status=commerce.Invoice.STATUS_PAID,
     ).values(
         "price", "quantity"
-    ).aggregate(total=Sum(F("price") * F("quantity")))
+    ).aggregate(
+        total=Sum(F("price") * F("quantity"), output_field=CURRENCY()),
+    )
 
     data.append(["Paid items", sales["total"]])
 
diff --git a/registrasion/views.py b/registrasion/views.py
index c457295f..704b05c2 100644
--- a/registrasion/views.py
+++ b/registrasion/views.py
@@ -826,6 +826,10 @@ def amend_registration(request, user_id):
         prefix="products",
     )
 
+    for item, form in zip(items, formset):
+        queryset = inventory.Product.objects.filter(id=item.product.id)
+        form.fields["product"].queryset = queryset
+
     voucher_form = forms.VoucherForm(
         request.POST or None,
         prefix="voucher",
@@ -847,10 +851,13 @@ def amend_registration(request, user_id):
             for ve_field in ve.error_list:
                 product, message = ve_field.message
                 for form in formset:
+                    if "product" not in form.cleaned_data:
+                        # This is the empty form.
+                        continue
                     if form.cleaned_data["product"] == product:
                         form.add_error("quantity", message)
 
-    if request.POST and voucher_form.is_valid():
+    if request.POST and voucher_form.has_changed() and voucher_form.is_valid():
         try:
             current_cart.apply_voucher(voucher_form.cleaned_data["voucher"])
             return redirect(amend_registration, user_id)