AngularJS UI启动日期选择器工作不正常

我有一个指令定义如下：

模板

<div class="date-picker">
    <div class="row">
        <div class="col-md-6">
            <label for="{{datePickerId}}">{{labelText}}</label>
            <p class="input-group">
                <input type="text"
                       id="{{datePickerId}}"
                       class="form-control"
                       datepicker-popup="{{format}}"
                       ng-model="dt"
                       is-open="opened"
                       datepicker-options="dateOptions"
                       disabled="disabled"
                       ng-required="true"
                       close-text="Close" />
                <span class="input-group-btn">
                    <button type="button" class="btn btn-default" ng-click="open($event)"><i class="glyphicon glyphicon-calendar"></i></button>
                </span>
            </p>
        </div>
    </div>
</div>

指令

//TypeScript
module MyApp.Directives {
    /** Scope for Messaging directive. */
    export interface IMaDatePickerScope extends ng.IScope {
        dt: Date;
        today(): void;
        clear(): void;
        disabled(date, mode): boolean;
        open($event): void;
        opened: boolean;
        dateOptions;
        formats: string[];
        format: string;
    }

    export class MaDatePicker implements ng.IDirective {
        restrict = "E";
        templateUrl = TEMPLATES + 'ma-date-picker.html';
        replace = true;
        transclude = true;
        scope = {
            labelText: '@',
            datePickerId: '='
        }
        link = (scope: IMaDatePickerScope) => {
            scope.today = () => {
                scope.dt = new Date();
            }
            scope.today();
            scope.clear = () => {
                scope.dt = null;
            }
            scope.disabled = (date: Date, mode) => {
                return (mode == 'day' && (date.getDay() === 0 || date.getDay() === 6)); //disable Saturday and Sunday
            }
            scope.open = ($event) => {
                $event.preventDefault();
                $event.stopPropagation();
                scope.opened = true;
            }
            scope.dateOptions = {
                formatYear: 'yy',
                startingDay: 1
            }
            scope.formats = ['yyyy-MM-dd', 'dd-MMMM-yy', 'yyyy/MM/dd', 'dd.MM.yyyy', 'shortDate'];
            scope.format = scope.formats[0];            
        }
        controller = ($scope: IMaDatePickerScope) => {
        }
    }
}

它取自这里的DatePicker部分，应该与该页面上显示的弹出版本类似。然而，每当我单击日历按钮启动指令时，日历都会以一种损坏的方式出现。此外，当我点击弹出日历中的"下个月"箭头时，日历会一直向左扩展。我的代码有问题吗？我没有添加任何样式，因为根据网站，似乎没有任何样式，但在拆开我现有的样式之前，我想检查一下代码是否有任何明显的错误。