All sections by default have top and bottom padding of 40px. If I change that to 20 or 30 within section settings, the padding number will be reduced by 20 or 10. If I give that section it’s own css class and change the padding to 20 or 30, the padding number will increase by 20 or 10. Why is the behaviour opposite?
I would prefer to use css if I’m using the same classes across the site rather than apply the same settings repeatedly. I also think it’s more user friendly for a client if they don’t have to worry about those settings (if WP is really user friendly at all for non-technical people).