【报Bug】

详细问题描述
[内容]

重现步骤
[步骤]
1、加入mui上拉加载，下拉刷新的代码demo pullrefresh_sub.html
2、在js中加入scroll定位代码 mui('#pullrefresh').scroll().scrollTo(0, -100, 0);

[结果]
出现两个mui滚动条 mui-scrollbar mui-scrollbar-vertical

[期望]
只有一个滚动条

运行环境
pc或手机都会出现

[系统版本]
任意

[浏览器版本]
任意

[IDE版本]
任意

[mui版本]
Mui v3.3.0

附件
[代码片段]
mui('#pullrefresh').scroll().scrollTo(0, -100, 0);
mui.init({
pullRefresh: {
container: '#pullrefresh',
down: {
callback: pulldownRefresh
},
up: {
contentrefresh: '正在加载...',
callback: pullupRefresh
}
}
});
/**

• 下拉刷新具体业务实现
  */
  function pulldownRefresh() {
  setTimeout(function() {
  var table = document.body.querySelector('.mui-table-view');
  var cells = document.body.querySelectorAll('.mui-table-view-cell');
  for (var i = cells.length, len = i + 3; i < len; i++) {
  var li = document.createElement('li');
  li.className = 'mui-table-view-cell';
  li.innerHTML = '<a class="mui-navigate-right">Item ' + (i + 1) + '</a>';
  //下拉刷新，新纪录插到最前面；
  table.insertBefore(li, table.firstChild);
  }
  mui('#pullrefresh').pullRefresh().endPulldownToRefresh(); //refresh completed
  }, 1500);
  }
  var count = 0;
  /**

• 上拉加载具体业务实现
  */
  function pullupRefresh() {
  setTimeout(function() {
  mui('#pullrefresh').pullRefresh().endPullupToRefresh((++count > 2)); //参数为true代表没有更多数据了。
  var table = document.body.querySelector('.mui-table-view');
  var cells = document.body.querySelectorAll('.mui-table-view-cell');
  for (var i = cells.length, len = i + 20; i < len; i++) {
  var li = document.createElement('li');
  li.className = 'mui-table-view-cell';
  li.innerHTML = '<a class="mui-navigate-right">Item ' + (i + 1) + '</a>';
  table.appendChild(li);
  }
  }, 1500);
  }
  if (mui.os.plus) {
  mui.plusReady(function() {
  setTimeout(function() {
  mui('#pullrefresh').pullRefresh().pullupLoading();
  }, 1000);

          });  
      } else {  
          mui.ready(function() {  
              mui('#pullrefresh').pullRefresh().pullupLoading();  
          });  
      }  

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