>Did you read the quote you quoted?

Did you read what I wrote? Did I say it wasn't created with her SSN? I'm saying "if it was created with her SSN, then the service should have given her access.

We use the "if X" in my parts to mean "since X was the case, then....". And it seems it's valid in US English too:

Even if the speaker has just read a report explicitly stating that X did Y, using "if" is perfectly possible. The important distinction is that "if" does not necessarily indicate doubt about whether the Y occurred. In this context, it can have two interpretations:

Conditional justification: "If X did Y, then so and so is justified" The speaker is explaining what makes some reaction justifiable, without necessarily questioning the report.

Uncertainty about the facts: "Assuming X really did Y, then so and so was justified." Here, the speaker is reserving judgment about whether the report is accurate.

Both interpretations are available to a native English speaker.