Setting aside the obvious question of why a forger would not collapse the image down to a single plane in the first place, the "organization" of the various layers makes no sense if presumed to be someone fabricating the document.
The reality is that when a scanned bitmap image is brought into Adobe Illustrator, it is "vectorized" and the different vector elements are assigned into separate layers by the Software. This is the normal mode of operation by Illustrator when dealing with scanned images and is not evidence of nefarious activity in and of itself.
Obama is hoping this birth certificate issue will eclipse the wars and economy, then he is going to wait until just before the election to come clean on his real father and shame his opponents for playing "dirty politics" to ride the tide of public sympathy into his second term.
"Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father ... And then will I profess unto them, I never knew you: depart from me, ye that work iniquity."
"If the people let government decide what foods they eat and what medicines they take, their bodies will soon be in as sorry a state as are the souls of those who live under tyranny." - Thomas Jefferson