The back needs to be optimized and if you contact Chan I am sure they will take care of it for free (I think issues like this can even be fixed by a decent alterations tailor).
Regarding the sleeve: I am not sure that the coat should be cut to hang perfectly on the hanger, but I see what worries you. Again a quick check-in with Chan might get you closer to a fix.
Quick question: How many fittings did you have? A basted and two additional ones?
Frankly, I don't care how it looks on the hanger, I only brought this up, and posted a picture of it to show how the rotational problems of the jacket sleeve whilst on the hanger, are present when I'm wearing it.
The reason for this post is to solicit for information on whether the concerns I have regarding the fit of the jacket are common and issues that a tailor should remedy. I never had these problems when I had a few suits made by other tailors. They pretty much ensured everything was down pat before I walked out. Didn't want to request that Chan remedy a problem that isn't really a problem.
But based on the posts, it seems that there's a consensus that the problems I'm encountering are easily remediable, and are issues they should have rectified.
I had a total of two fittings, and I actually spoke to Patrick about the sleeve issues on the second fitting. Am somewhat surprised it hasn't been 'ironed' out. Might have slipped his mind. I picked the suit up an hour before I was due at the airport so it was a rush for me, and I didn't have time to look over it carefully. Most unfortunate.