What this could be though, is that this is an unofficial birth certificate.
When I was born in PA, when I was going into the navy, I found out that the birth certificate I had, wasn’t. I found out that even though it says birth certificate, without the state seal on the paper, it isn’t official.
They delayed me joining until I requested a new certificate and they mailed it to me.
Asking my mom about it, she said that they gave her the document that she thought was a birth certificate at the hospital and didn’t mail it to her.
I don’t know what the reason for this is, just that my mother and everyone believed this was a birth certificate while the Navy clearly new it wasn’t.