When you have a set of collapsibles inside a modal events from inside like "shown" are bubbling up. So unless you make sure it's only the modal you are listening to, the callback will fire anyway. Better make sure it only happens once.

gistfile1.js

$("#modal").modal({
  show: true,
  backdrop: true,
  keyboard: true
}).on("shown",function(e) {
  /* suppress 'shown' events bubbling up from inside */
  if ($(e.target).hasClass('modal')){
    /*do something*/
  }
});