title: modified date changes after upload
body: <p>I am integrating with the v2 Box rest api from an iOS app.</p>
  
  <p>When I upload a file I cache it's modified date (as reported by Box in the return JSON)</p>
  
  <p>Sometime later, I request the folder contents and check the modified date on the file (to see if it's changed since I last uploaded.) Depending upon how long I wait, the modified date changes - wtf!!!</p>
  
  <p>If I request the folder contents immediately (msecs) after upload then the modified date is as it was after upload. If I wait 3 or 4 seconds then the date changes (by 1 second typically.)</p>
  
  <p>Anyone from Box know why this might be - and how to fix it?</p>