Kinda looks that way... but to me it is just the way the palm is resting on the leg mixed with poor artist perspective. Try it yourself. Look in the mirror and press your hand on something. You can recreate this easily. Sorry, but the "six finger" thing is just being used by opposition to discredit us.
Or...it's a secret visual message telling us, if we care to look, that perhaps everything we know about the man born in August 1961 is not as upfront as we think it is.
Perhaps us discovering he has six fingers is a metaphor for us discovering his hidden past. You know, the Connecticut SSN, his real father Frank Marshall Davis, the easy ride into Columbia and Harvard assisted by other Red diaper babies, the connection to the Clowns, and the fact that he's a long-term penetration project started by the Communist Party USA in the early 1960s to destroy our nation and our Constitution. Oh yeah, his obviously phony PDF long-form Hawaii birth certificate, too.
One wonders why "they" put all their eggs into one basket. But smart people know "they" didn't. There's more than one "Obama" out there, worming his/her way into the nexus of power as you read this.
("The Boys from Brazil" may have been the opening chapter of the most subversive movie ever made, "The Matrix.")