Lisa, that jacket doesn't make you look big. It makes you look like you're wearing a fluffy cloud of fluffy cotton candy in a scrummy fall color. I actually love the outfit and think you look great!
And I don't know what is up with seams on pants. I have several pairs of pants and leggings that twist around like that, too. It is the MOST annoying thing. It has to be something in the fabric or construction making it twist like that, like maybe they didn't cut on the grain but on the bias or even however they had to cut to not waste fabric and get more pairs of Jean's out of a bolt of fabric? Whatever it is, it's just stupid and they need to stop it.