idverify.irs.gov Which Result?

This is either a tax question or an HTML question. After an unusually long one-month wait for a refund, I get a letter from the IRS asking I go to a site of theirs: idverify.irs.gov
The site asked a few multiple-choice questions to verify my identity, and I believe I answered all correctly. (One, “which cities of this list have you lived in” had “None of the above” as an optional answer, and “Phoenix” as another optional answer. I had only lived in Phoenix briefly and did not file taxes from there, but I did reside there, so I answered correctly. But I’m not sure that is consistent with IRS’s information. ) Anyway, the site appeared to verify me and served a page stating “You have successfully completed the Identity verification process. The IRS will Process your return.”
Fine. However, I pressed the browser’s back button and got a page stating the opposite conclusion: We were unable to verify you online.”
Now, I believe the original screen is the meaningful one, but I’m a bit concerned. Opinions please?

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