diff --git a/lms/djangoapps/branding/api.py b/lms/djangoapps/branding/api.py
index 119f3aa06b..b040774678 100644
--- a/lms/djangoapps/branding/api.py
+++ b/lms/djangoapps/branding/api.py
@@ -277,7 +277,7 @@ def _absolute_url(is_secure, url_path):
 
 
 def _absolute_url_staticfile(is_secure, name):
-    """Construct an absolute URL back to a static resource on the site.
+    """Construct an absolute URL to a static resource on the site.
 
     Arguments:
         is_secure (bool): If true, use HTTPS as the protocol.
@@ -288,4 +288,13 @@ def _absolute_url_staticfile(is_secure, name):
 
     """
     url_path = staticfiles_storage.url(name)
+
+    # In production, the static files URL will be an absolute
+    # URL pointing to a CDN.  If this happens, we can just
+    # return the URL.
+    if urlparse.urlparse(url_path).netloc:
+        return url_path
+
+    # For local development, the returned URL will be relative,
+    # so we need to make it absolute.
     return _absolute_url(is_secure, url_path)
diff --git a/lms/djangoapps/branding/tests/test_views.py b/lms/djangoapps/branding/tests/test_views.py
index b11ab62518..41c7db22cb 100644
--- a/lms/djangoapps/branding/tests/test_views.py
+++ b/lms/djangoapps/branding/tests/test_views.py
@@ -102,6 +102,26 @@ class TestFooter(TestCase):
         # Copyright
         self.assertIn("copyright", json_data)
 
+    def test_absolute_urls_with_cdn(self):
+        self._set_feature_flag(True)
+
+        # Ordinarily, we'd use `override_settings()` to override STATIC_URL,
+        # which is what the staticfiles storage backend is using to construct the URL.
+        # Unfortunately, other parts of the system are caching this value on module
+        # load, which can cause other tests to fail.  To ensure that this change
+        # doesn't affect other tests, we patch the `url()` method directly instead.
+        cdn_url = "http://cdn.example.com/static/image.png"
+        with mock.patch('branding.api.staticfiles_storage.url', return_value=cdn_url):
+            resp = self._get_footer()
+
+        self.assertEqual(resp.status_code, 200)
+        json_data = json.loads(resp.content)
+
+        self.assertEqual(json_data["logo_image"], cdn_url)
+
+        for link in json_data["mobile_links"]:
+            self.assertEqual(link["url"], cdn_url)
+
     @ddt.data(
         ("en", "registered trademarks"),
         ("eo", u"régïstéréd trädémärks"),  # Dummy language string
diff --git a/lms/djangoapps/shoppingcart/models.py b/lms/djangoapps/shoppingcart/models.py
index b462d268c7..8bf707890d 100644
--- a/lms/djangoapps/shoppingcart/models.py
+++ b/lms/djangoapps/shoppingcart/models.py
@@ -1185,10 +1185,15 @@ class RegistrationCodeRedemption(models.Model):
         Returns RegistrationCodeRedemption object if registration code
         has been used during the course enrollment else Returns None.
         """
-        try:
-            return cls.objects.get(course_enrollment=course_enrollment)
-        except RegistrationCodeRedemption.DoesNotExist:
-            return None
+        # theoretically there could be more than one (e.g. someone self-unenrolls
+        # then re-enrolls with a different regcode)
+        reg_codes = cls.objects.filter(course_enrollment=course_enrollment).order_by('-redeemed_at')
+        if reg_codes:
+            # return the first one. In all normal use cases of registration codes
+            # the user will only have one
+            return reg_codes[0]
+
+        return None
 
     @classmethod
     def is_registration_code_redeemed(cls, course_reg_code):
diff --git a/lms/djangoapps/shoppingcart/tests/test_models.py b/lms/djangoapps/shoppingcart/tests/test_models.py
index b3581e0832..447e9bf29f 100644
--- a/lms/djangoapps/shoppingcart/tests/test_models.py
+++ b/lms/djangoapps/shoppingcart/tests/test_models.py
@@ -27,7 +27,8 @@ from shoppingcart.models import (
     Order, OrderItem, CertificateItem,
     InvalidCartItem, CourseRegistrationCode, PaidCourseRegistration, CourseRegCodeItem,
     Donation, OrderItemSubclassPK,
-    Invoice, CourseRegistrationCodeInvoiceItem, InvoiceTransaction, InvoiceHistory
+    Invoice, CourseRegistrationCodeInvoiceItem, InvoiceTransaction, InvoiceHistory,
+    RegistrationCodeRedemption
 )
 from student.tests.factories import UserFactory
 from student.models import CourseEnrollment
@@ -470,6 +471,60 @@ class PaidCourseRegistrationTest(ModuleStoreTestCase):
         # check that the registration codes are generated against the order
         self.assertEqual(len(CourseRegistrationCode.objects.filter(order=self.cart)), item.qty)
 
+    def test_regcode_redemptions(self):
+        """
+        Asserts the data model around RegistrationCodeRedemption
+        """
+        self.cart.order_type = 'business'
+        self.cart.save()
+        CourseRegCodeItem.add_to_order(self.cart, self.course_key, 2)
+        self.cart.purchase()
+
+        reg_code = CourseRegistrationCode.objects.filter(order=self.cart)[0]
+
+        enrollment = CourseEnrollment.enroll(self.user, self.course_key)
+
+        redemption = RegistrationCodeRedemption(
+            registration_code=reg_code,
+            redeemed_by=self.user,
+            course_enrollment=enrollment
+        )
+        redemption.save()
+
+        test_redemption = RegistrationCodeRedemption.registration_code_used_for_enrollment(enrollment)
+
+        self.assertEqual(test_redemption.id, redemption.id)  # pylint: disable=no-member
+
+    def test_regcode_multi_redemptions(self):
+        """
+        Asserts the data model around RegistrationCodeRedemption and
+        what happens when we do multiple redemptions by same user
+        """
+        self.cart.order_type = 'business'
+        self.cart.save()
+        CourseRegCodeItem.add_to_order(self.cart, self.course_key, 2)
+        self.cart.purchase()
+
+        reg_codes = CourseRegistrationCode.objects.filter(order=self.cart)
+
+        self.assertEqual(len(reg_codes), 2)
+
+        enrollment = CourseEnrollment.enroll(self.user, self.course_key)
+
+        ids = []
+        for reg_code in reg_codes:
+            redemption = RegistrationCodeRedemption(
+                registration_code=reg_code,
+                redeemed_by=self.user,
+                course_enrollment=enrollment
+            )
+            redemption.save()
+            ids.append(redemption.id)  # pylint: disable=no-member
+
+        test_redemption = RegistrationCodeRedemption.registration_code_used_for_enrollment(enrollment)
+
+        self.assertIn(test_redemption.id, ids)  # pylint: disable=no-member
+
     def test_add_with_default_mode(self):
         """
         Tests add_to_cart where the mode specified in the argument is NOT in the database
diff --git a/lms/djangoapps/verify_student/admin.py b/lms/djangoapps/verify_student/admin.py
index 73d878a786..241bcea17a 100644
--- a/lms/djangoapps/verify_student/admin.py
+++ b/lms/djangoapps/verify_student/admin.py
@@ -14,6 +14,7 @@ class SoftwareSecurePhotoVerificationAdmin(admin.ModelAdmin):
     """
     list_display = ('id', 'user', 'status', 'receipt_id', 'submitted_at', 'updated_at')
     exclude = ('window',)   # TODO: Remove after deleting this field from the model.
+    raw_id_fields = ('user', 'reviewing_user')
     search_fields = (
         'receipt_id',
     )
@@ -26,6 +27,7 @@ class VerificationStatusAdmin(admin.ModelAdmin):
     list_display = ('timestamp', 'user', 'status', 'checkpoint')
     readonly_fields = ()
     search_fields = ('checkpoint__checkpoint_location', 'user__username')
+    raw_id_fields = ('user',)
 
     def get_readonly_fields(self, request, obj=None):
         """When editing an existing record, all fields should be read-only.
@@ -47,6 +49,7 @@ class VerificationStatusAdmin(admin.ModelAdmin):
 class SkippedReverificationAdmin(admin.ModelAdmin):
     """Admin for the SkippedReverification table. """
     list_display = ('created_at', 'user', 'course_id', 'checkpoint')
+    raw_id_fields = ('user',)
     readonly_fields = ('user', 'course_id')
     search_fields = ('user__username', 'course_id', 'checkpoint__checkpoint_location')