If it's "set" on the dial as 215 (I don't remember the smokette having that temp exactly) and it's holding steady at 230 to 240, that's only 15 to 25 above the set temp.
The KEY is that it's maintaining that temp.
We can really solve the issue of why it's set at one but reading another (too many questions to ask) so we'll focus on it being consistent.
We've actually had the discussions about the smokette's averaging more than 2 hours a pd. Mine never did, but plenty of people have that as their baseline.
If you're wanting it done, but the temp up until it's 250 internal temp of the smoker, the butt won't mind.