/diy/ - Do It Yourself

When I backstitch zigzag it gets a bit tangly. Why is this? Is my tension a bit low? It seemed right on the straight stitch but I'm guessing maybe zigzag could need different settings

Also on this fabric it's kinda hard to tell right and wrong sides. To me they both look the same, but a relative says you can tell if you look close enough. Am I being gaslit?