The Zip code on my Autofill credit card changed from 32821 to 32805 without my involvement! By whom and Why?

I have no clue how this happened. It wasn't done by me! I have never, ever used Zip code 32805 for anything. I have lived in 32821 for years and use that zip code daily. When it changed I was unable to change it bac which only involves the last two digits. Now, when I use the autofil I am careful to modify the Zip to 32821 before I use the autofil credit card. I would appreciate it if the Zip code is permanently eorrected or if I am instructed on how to do that. I haven't been successful myself to , personally change it.