shares to be registered with the SEC are for the convertible notes and warrants. The extra shares insure the investors that when the time comes to excercise the shares will positively be available.
Example: You buy a home and it closes in escrow because something is in need of repair. It is said it will cost $5000 dollars to repair. The closing department will require 3-5 times that amount to be held in escrow to make sure the job is expedited and also guarantee the monies are available if the repairs cost more than stated.