Scooby-
I want to examine your last thought. Because AMCAS is completely unreliable, I went ahead and sent my transcripts, MCAT score and committee packet to every school. When UCSF invited me to complete their secondary, they said that anything they received (transcripts/letters) would have been thrown out. I don't understand how time consuming it could be to create a file and just wait. It would seem obvious that I didn't send it there just to waste their time!! 🙂
Choker-
My advice is that its not too late at all. Just hurry and do as much as possible as quickly as possible. BUT...not so quickly as to synthesize poor essay/short answer responses. Take some time on these (but not too much!) and get it done as soon as is reasonably possible. Many of the essay questions to secondaries are in this forum...I would set aside a weekend and just do as many as possible. I think you'll find that many questions are at least partially redundant and you can either recycle ideas or parts of other essays. Best of luck!