In two different cases where I’ve disputed part of a charge/order, the credit card company returned the money for the entire order like you said. I was surprised they did that, and didn’t realize that was the norm.

On the one hand, I never wanted anything I extra that I didn’t deserve. On the other hand, both times this has happened to me, the companies at fault really, really went out of their way to deserve it. Not necessarily scam level deserved it like this hotel’s smoke detector scam, but still.