AngularUI sortable does not work for more then one applications

问题

I have created angularjs application with sortable list. My application can be included to the page few times with other different applications. (Each of this angular applications is isolated user control)

var myapp = angular.module('myapp', ['ui']);
myapp.controller('controller', function ($scope) {
    $scope.list1 = ["1", "2", "3"];
});

angular.bootstrap($("#app1"), ['myapp']);
angular.bootstrap($("#app2"), ['myapp']);

http://jsfiddle.net/X2h8W/

For this case ui-sortable works only for last application in a page. This code: angular.bootstrap(document, ['myapp']); fixes problem, but I want have few isolated application on a page.

Is this angular-ui bug? Is this some configuration for angular ui?

来源：https://stackoverflow.com/questions/15486976/angularui-sortable-does-not-work-for-more-then-one-applications