So its flexing toward the belly as if it is being drawn? If thats the case, your board is deflexed. All things equal, this will yield a smoother draw, though the speed will suffer a bit. Hickory tends to take a bit of set so I wouldnt be surprised to see that 2″ deflex turn into 3 – 5inches of set.
You can turn it around and then the deflex will be reflex, giving results on the opposite side of the spectrum. Have fun!