SSN data isn't flawless. My brother and I somehow had the same SSN until I was in my teens (right as I started working but before he did so thankfully it wasn't too difficult to fix).
Doesn't matter. The credit bureaus mix people up all of the time, particularly if you shared a name and street in the past.
My wife and mother in law share a first name. And a middle name that varies by one letter. (Ie. Mary Ann and Mary Beth) credit reports routinely mix them up.
When I was in school in 1996, a collector managed to get a business debt of my grandfather (who shared a name and died in 1986) attached to me.
