If you look at the email screenshot it’s from sdf.org. They’re pretty awesome and I’m guessing it’s just some sort of oversight. OP should just send them an email and I’m sure they’d resolve it.

Just if you wanted more than one. Just like u/kadu said about email. It's like if you had your email on Google, Yahoo, and Hotmail. I know a lot of people have an alt on platforms like Discord too.