the source code for your "angry woman" msg shows height and width decl.:

the bondware forum software limits page width, hence it shrinks img width to fit (because 1 or more users complained about having to scroll right/left several yrs ago), but allows height decl., thus changing the aspect ratio.  when I post an external img, I paste in the img src code via html editing, i.e. I don't paste an img into their reply box.  doing the latter adds the width and height to the source code of the msg., thus allowing their software to squish the img horizontally.