title: jQuery UI connectToSortable drop event trigger twice
body: <p>I am using jQuery UI draggable and sortable,
  When I use <code>connectToSortable</code> then drop event get triggered twice.</p>
  
  <p>After searching on net I got that it is a BUG, 
  I tried many solution but none of them are working.</p>
  
  <p>Please tell me how do solve <code>connectToSortable</code> drop event with and example.</p>
  
  <p>Thanks
  I have tried this:</p>
  
  <p><a href="https://stackoverflow.com/questions/9479438/jquery-ui-drop-event-of-droppable-fires-on-sortable">jQuery UI drop event of droppable fires on sortable</a></p>
  
  <p><a href="https://stackoverflow.com/questions/8495765/jquery-draggable-sortable-with-custom-html-on-drop-event?rq=1">jquery draggable +sortable with custom html on drop event?</a></p>