Bitwarden support responded, and I have to give them a lot of credit for that. The error has been fixed.
Thank you for bringing this to our attention! I apologize for the inconvenience.
I can see an incorrect discount was applied and we’ve issued a refund for the difference to your PayPal. Refunds to PayPal can take up to 2 business days to appear in your account.
Please note, Bitwarden has begun assessing VAT separately from the cost of personal-use subscriptions starting in 2025. More information can be found at https://bitwarden.com/help/tax-calculation
Please don’t hesitate to let me know if you have any questions or concerns.