diff --git a/pybossa/themes/default b/pybossa/themes/default
index c8376e679..2381ff7b3 160000
--- a/pybossa/themes/default
+++ b/pybossa/themes/default
@@ -1 +1 @@
-Subproject commit c8376e67917dce4f2ee106dd113822b363515b9c
+Subproject commit 2381ff7b3c8b2657da1bfca787850e087ff4a911
diff --git a/pybossa/view/projects.py b/pybossa/view/projects.py
index 0b4e92913..5d835bd32 100644
--- a/pybossa/view/projects.py
+++ b/pybossa/view/projects.py
@@ -3865,7 +3865,9 @@ def assign_users(short_name):
 
     # Update users with last_name for sorting.
     for user in users:
-        full_name_parts = user.get('fullname', '').split(' ')
+        # Remove content within parentheses and digits in name: Jane Doe (ai)
+        cleaned_name = re.sub(r'\s*\(.*?\)|\d+', '', user.get('fullname', ''))
+        full_name_parts = cleaned_name.split(' ')
         user['last_name'] = full_name_parts[-1] if len(full_name_parts) > 1 else user.get('fullname')
 
     form = DataAccessForm(request.body)
diff --git a/test/test_web.py b/test/test_web.py
index affba4ea8..73e490486 100644
--- a/test/test_web.py
+++ b/test/test_web.py
@@ -9928,14 +9928,16 @@ def test_get_assign_users_to_project(self):
         user1.info['data_access'] = ["L1", "L2", "L3", "L4"]
         user_repo.save(user1)
 
-        user2 = UserFactory.create(id=998, subadmin=False, admin=False, name="workeruser1")
+        user2 = UserFactory.create(id=998, subadmin=False, admin=False, name="workeruser_one")
         user2.set_password('1234')
         user2.info['data_access'] = ["L1", "L2", "L3", "L4"]
+        user2.fullname = 'workeruser one'
         user_repo.save(user2)
 
-        user3 = UserFactory.create(id=997, subadmin=False, admin=False, name="workeruser2", enabled=False)
+        user3 = UserFactory.create(id=997, subadmin=False, admin=False, name="workeruser_two", enabled=False)
         user3.set_password('1234')
         user3.info['data_access'] = ["L1", "L2", "L3", "L4"]
+        user3.fullname = 'workeruser two'
         user_repo.save(user3)
 
         project = ProjectFactory.create(info={
@@ -9954,9 +9956,9 @@ def test_get_assign_users_to_project(self):
             res = self.app.get('/project/{}/assign-users'.format(project.short_name))
 
             # Confirm users exist in the page and disables users do not.
-            assert user1.fullname in str(res.data), 'User 1 not found on assign-users page.'
-            assert user2.fullname in str(res.data), 'User 2 not found on assign-users page.'
-            assert user3.fullname not in str(res.data), 'User 3 is disabled and should not be found on assign-users page.'
+            assert user1.fullname in str(res.data), user1.fullname + ' not found on assign-users page.'
+            assert user2.fullname in str(res.data), user2.fullname + ' not found on assign-users page.'
+            assert user3.fullname not in str(res.data), user3.fullname + ' is disabled and should not be found on assign-users page.'
 
     @with_context
     @patch('pybossa.view.account.send_mail', autospec=True)