Not wanting to criticize but I normally apply double studs at the header. One stud just as you have it with the extra stud under the header thus allowing it to rest on the extra stud. Too late to change it now as the header would need to be 3 inches longer (1.5 inches each way). Should work either way. Make sure to use plenty of nails as that is supporting the weight of the header and that portion of your roof. Something else you could do is apply sheeting inside and out cut in an "L" profile for added support.
Otherwise looking good.
John
