title: Moment js :- Getting Unexpected behaviour
body: <p>I'm trying to compare two dates using moment js but getting an unexpected output :- </p>
  
  <pre><code>var day1 = moment("24-01-2016 19:29","DD-MM-YYYY HH:mm");
  var day2 = day1.add('m', 500);
  document.writeln(day1.isBefore(day2,'minute'));
  output : false (Expected to be true)
  document.writeln(day1.isSame(day2,'minute'));
  output : true (Don't know why)
  </code></pre>
  
  <p>I'm totally confused. It seems i'm missing something.</p>