diff --git a/static/javascript/kdm.js b/static/javascript/kdm.js
index 957da87..76048cd 100644
--- a/static/javascript/kdm.js
+++ b/static/javascript/kdm.js
@@ -200,12 +200,13 @@
                                     eventName: setEvent
                                 });
                             }
+                            $rootScope.$apply();
                             $(this).dialog("close");
                         } else {
                             $rootScope.addtimeline.error = true;
                             $rootScope.addtimeline.errormsg = msgs.join(", ");
+                            $rootScope.$apply();
                         }
-                        $rootScope.$apply();
                     },
                     Cancel: function() {
                         $(this).dialog("close");
@@ -323,6 +324,7 @@
             scope.$watch('tabs[' + tabIndex + '].population.lost', watchCheckboxArray, true);
             scope.$watch('tabs[' + tabIndex + '].deathCount', watchCheckboxArray, true);
             scope.$watch('tabs[' + tabIndex + '].timeline', watchCheckboxArray, true);
+            scope.$watch('tabs[' + tabIndex + '].principles', watchPrinciples, true);
         }
     }
     
@@ -356,6 +358,22 @@
         }
     }
     
+    function watchPrinciples(newVal, oldVal) {
+        if (newVal !== oldVal) {
+            var newCur;
+            var oldCur;
+            for (var i = 0; i < newVal.length; i++) {
+                newCur = newVal[i];
+                oldCur = oldVal[i];
+                if (newCur.choiceleft && oldCur.choiceright) {
+                    newCur.choiceright = false;
+                } else if (newCur.choiceright && oldCur.choiceleft) {
+                    newCur.choiceleft = false;
+                }
+            }
+        }
+    }
+    
     function deleteTab($rootScope, tabid) {
         var tabs = $rootScope.tabs;
         var index = -1;
diff --git a/static/templates/settlement/principles.html b/static/templates/settlement/principles.html
index 851bbae..25d96fd 100644
--- a/static/templates/settlement/principles.html
+++ b/static/templates/settlement/principles.html
@@ -11,7 +11,7 @@
                 <input type="text" ng-readonly="principle.disabled" class="underlined fullwidth left-align" ng-model="principle.name">
             </div>
             <div class="col-xs-1">
-                <label ng-show="principle.left" class="radio-inline"><input type="radio" name="{{principle.name}}" value="{{principle.left}}" ng-model="principle.choice" class="radio-box"><span></span></label>
+                <label ng-show="principle.left"><input type="checkbox" name="{{principle.name}}" value="{{principle.left}}" ng-model="principle.choiceleft" ><span></span></label>
             </div>
             <div class="col-xs-3">
                 <input type="text" ng-readonly="principle.disabled" class="underlined left-align" ng-model="principle.left">
@@ -20,7 +20,7 @@
                 <small>or</small>
             </div>
             <div class="col-xs-1">
-                <label ng-show="principle.right" class="radio-inline"><input type="radio" name="{{principle.name}}" value="{{principle.right}}" ng-model="principle.choice" class="radio-box"><span></span></label>
+                <label ng-show="principle.right"><input type="checkbox" name="{{principle.name}}" value="{{principle.right}}" ng-model="principle.choiceright"><span></span></label>
             </div>
             <div class="col-xs-3">
                 <input type="text" ng-readonly="principle.disabled" class="underlined left-align" ng-model="principle.right">