Ernest - as you can tell, I was under the same impression you're in regarding changing your stance and the alignments of your body. In fact I'm glad you asked your questions as it told me I'm not the only confused one out there regarding this topic
Thanks Erik and Mike - I think you two have answered my questions and solved this mystery for me. For some reason, I've always thought that opening or closing your stance ONLY means you change your footings but the rest of your body alignment (hips, shoulders, arms, etc) all remain the same lining up parallel left of the target. Thinking in terms of a closed stance being that I'm lining up right of the target with a clubface that is closed to my stance (and vice versa for an open stance) connected the dots for me.
Have a great one!
Happy to help, and glad we could cut through any confusion. Apologies if things were confusing before. Perhaps a video on this is needed.