Hi Melanie, welcome, and good news, this is almost always one setting. When the weekend shows lower than your base and the premium just will not stick, the usual culprit is Smart Pricing being switched on. With Smart Pricing on, Airbnb sets each night itself within your range, so your manual $232 base and your 20% weekend premium are not really being applied, which is why the weekend lands at $227 no matter what you set the premium to.
Quick way to check and fix: go to your listing, then Pricing, and look for Smart Pricing. If it is on and you want to control the numbers yourself, turn it off, and your $232 base plus the weekend premium should show as about $278 on Friday and Saturday. If you would rather keep Smart Pricing, raise your minimum price so it can never drop below a floor you are happy with, though the weekend premium percentage will not apply cleanly while Smart Pricing is in charge.
Two other things worth a quick glance if that does not fully fix it: whether there is a separate weekend price set that is overriding the premium, and whether a new listing promotion is active, since Airbnb sometimes auto applies a discount to your first few bookings.
And one friendly tip since you are just starting out: in your first few weeks it is actually fine to sit a little lower on purpose, because the real goal early on is banking your first handful of five star reviews fast, and once you have those you raise your rates. Welcome again and good luck with it.