Hi BBQ gal.
Did you have the hole punched in the foil liner at bottom of the Smokette? Did you open the door during the cook? What temp did you cook at? How big was the butt? I think at 165*, it was in a plateau when you took it out. Next time, try starting out at a higher temp, adjust the wood according to how smoky this one was, let it go until it hits 195*, regardless of how long it takes, let rest 30 minutes, shred with forks.
The flat will be to dry if you cook it at too low a temp, and might be anyhow because of the small mass and low fat content. Try putting pork fat of some kind on top and cook at 250* until it reaches 185*, then rest and slice across the grain of the meat, as thin as possible.
Welcome to the forum!