title: Test Flight does not detect a new build with same version number
body: <p>I already have a app on testflight with version number say 2.2.1 with permission to 3 users. </p>
  
  <p>I now create another IPA with some minor changes, and upload the same to testflight with the exact same version number ( i cannot change the version# as this is an internal release). </p>
  
  <p>The upload is successful, but it does not add the "#2" to the build version. Because of this the permissions page comes down with the 3 testers already selected. </p>
  
  <p>The problem here now is, click " Update and notify" does not send emails to these 3 testers as they had been already given permissions for the previous build. </p>
  
  <p>Any help on how i can force testflight to detect that this is a new build?</p>
  
  <p>here's the reference for the feature.
  <a href="http://help.testflightapp.com/customer/portal/articles/402778-how-version-numbers-are-set-">http://help.testflightapp.com/customer/portal/articles/402778-how-version-numbers-are-set-</a></p>