What religious people mean by “faith” and what faith actually is do not have to be the same thing.
Also, Nietzsche was definitely not confused about what religious people mean by faith. You’re just confused because that quote isn’t a statement about what faith is, but rather, a statement about the psychology of the faithful.
That has to be the worst citation in support of an argument I’ve ever seen. “Standard usage”...is number 6 on a list of different models of faith in philosophical terms? Right. That’s clearly what most people mean when they talk about faith.
Also, trusting someone else is the opposite of fidelity to that person, not the same thing.
Regardless, the definition Nietzsche is using is obviously not referring to a trust-based model.