What I am concerning about on Barda is the 'resubm

What I am concerning about on Barda is the 'resubmitting'. Does this mean another 90 days? Why resubmit? Barda has all the other information, they just needed this additional information apparently, so why the need to resubmit? Why not add to just what is submitted and Barda look at the additional information to what has already been submitted or was resubmitting a poor choice of words. I am hoping they don't have to go back through the entire submission process again.