I ordered three bar stools initially followed by one more about 4 months later. While I was pleased with my purchase initially, these bar stools didn't last. I understand it swivels but all the stools are swiveling even if you're only sitting on it without moving. We checked if we can tighten the seats so it will not turn or swivel when we don't have to make it swivel or turn. Pls advise us as to any actions we need to take. Thank you.