diff --git a/data/interfaces/default/css/plexpy.css b/data/interfaces/default/css/plexpy.css
index 895fc738..86866feb 100644
--- a/data/interfaces/default/css/plexpy.css
+++ b/data/interfaces/default/css/plexpy.css
@@ -108,6 +108,9 @@ select.form-control {
     text-transform: uppercase;
     font-size: 10px;
 }
+.react-selectize.root-node .react-selectize-control .react-selectize-search-field-and-selected-values.negative-operator .value-wrapper:not(:first-child):before {
+    content: "and" !important;
+}
 .react-selectize.root-node .react-selectize-control .react-selectize-search-field-and-selected-values .resizable-input {
     padding-top: 3px !important;
     padding-bottom: 3px !important;
diff --git a/data/interfaces/default/notifier_config.html b/data/interfaces/default/notifier_config.html
index e96c3220..d99e1c37 100644
--- a/data/interfaces/default/notifier_config.html
+++ b/data/interfaces/default/notifier_config.html
@@ -342,7 +342,22 @@
             $('#custom_conditions').val(JSON.stringify(newConditions));
         }
     });
+
+    function setNegativeOperator(select) {
+       if (select.val() === 'does not contain' || select.val() === 'is not') {
+           select.closest('.form-group').find('.react-selectize-search-field-and-selected-values').addClass('negative-operator');
+       } else {
+           select.closest('.form-group').find('.react-selectize-search-field-and-selected-values').removeClass('negative-operator');
+       }
+    }
     
+    $('#condition-widget select[name=operator]').each(function () {
+        setNegativeOperator($(this));
+    });
+    $('#condition-widget').on('change', 'select[name=operator]', function () {
+        setNegativeOperator($(this));
+    });
+
     function reloadModal() {
         $.ajax({
             url: 'get_notifier_config_modal',
diff --git a/plexpy/notification_handler.py b/plexpy/notification_handler.py
index eeb5e5b2..d8acbce4 100644
--- a/plexpy/notification_handler.py
+++ b/plexpy/notification_handler.py
@@ -277,13 +277,13 @@ def notify_custom_conditions(notifier_id=None, parameters=None):
                 evaluated_conditions.append(any(c in parameter_value for c in values))
 
             elif operator == 'does not contain':
-                evaluated_conditions.append(any(c not in parameter_value for c in values))
+                evaluated_conditions.append(all(c not in parameter_value for c in values))
 
             elif operator == 'is':
                 evaluated_conditions.append(any(parameter_value == c for c in values))
 
             elif operator == 'is not':
-                evaluated_conditions.append(any(parameter_value != c for c in values))
+                evaluated_conditions.append(all(parameter_value != c for c in values))
 
             elif operator == 'begins with':
                 evaluated_conditions.append(parameter_value.startswith(tuple(values)))