Hi @maconbentley — welcome to Figma Forum, and thanks for the detailed report. I understand how concerning an unexpected charge like this is, especially when you didn't make any changes to your seats.
I'm not able to access and discuss billing details within this public space, but I've opened a ticket on your behalf with our Product Support team so they can review the charge and your invoice. Your case number is: 1831461, and they'll follow up at the email tied to your Figma account.
In the meantime, this resource explains common reasons for unexpected charges on your Figma bill, which may help provide some context: There are additional charges in my Figma bill.
I also removed some billing details from your original post to help protect your account privacy — appreciate your understanding on that.
Please keep an eye on your inbox for next steps. 🙏🏻