I was having the same issue. I followed the guy above's advice. Here's exactly what I did to get it to work:
- In iTunes Connect, remove the current build.
- In Xcode, change the build (not version) number to something else. I just picked "3".
- In Xcode, go to Product -> Archive
Note: If this is greyed out, ensure that you select "iOS Device" instead of a different simulator or connected hardware for testing
- In the Organizer - Archives window, click Validate, then click Distribute
- In the Organizer - Archives window, delete your previously submitted archive
- Go back to iTunes Connect, refresh, and select the new build with the updated version number