Hello, I was searching the internet and came across your post, as the same thing just happened to me. I paid off a November 2023 cruise in August, 2022. A couple days ago I was looking at my reservation to check excursions and noticed a $365.00 balance. I called Celebrity Customer Service, they spent some time going back and forth with supervisor, bottom line they said it should be fixed by 7/21/2023. How does this happen? Did they mention the reasoning to you? I am happy I found the mistake, but it could have wreaked havoc if I wa trying to straighten it out closer to departure.