I wounder how they handle the resubmissions! If you resubmit, do they do a 'compare' with the older version to see what's new, or do they not start reviewing until the deadline passes.

my guess is an over write.

I meant that, if you submitted your application two weeks ago, and they had already reviewed it (and probably made a decision about it); and then you resubmit today. How would the re-review happen? Do they compare with your old application to see if you changed something important, or do they review it again as if it was submitted for the first time? Not that it's important; but just wondering.