No, it's not normal.
"superadmin" is a default rank in Gmod, and ULX adds permissions to it on it's own, along with admin, that superadmin inherits, then operator, that both inherit.
Operator doesn't have much, it's more like a "example" custom group for ULX.
From server console, use "ulx resettodefaults", and then make sure you have latest ULib and ULX from
https://github.com/Nayruden/Ulysses and then make sure
you follow instructions for adding self as superadmin (if using non-listen server).
Remember, case sensitive. superadmin not Superadmin.