Hi all, I am new here and I hope someone can help me.  All the tops I have sewn for the last year (that’s when I picked up sewing again) have wrinkles that run from the bottom of the arm hole toward the center back and ONLY on the back bodice, the sleeve itself is fine and the front is ok.  It looks like the armhole is too small yet it feels comfortable and the back is not tight.  I want to adjust it like I have done with crotch length, take a deeper cut at the “hook” just in the back bodice.  Like I say, this is on knits too, even on tops that are too big and really need to be made smaller across the shoulders.  This is really baffling me, I cannot find any info on this!  I tried increasing the armhole size by 1 inch and that took care of those wrinkles in back but then I couldn’t move my arms in front, it changed the curve in the front and will not work.  Can you adjust just the back and if so what do I do with the sleeves?  I have noticed even store bought clothes do this but to a lesser extent.  I don’t think I am shaped in any odd sort of way yet I have tried every tips I have read about, a dozen or so muslins, and nothing has worked.  Please, anyone with suggestions?