Particular as banks and lenders are bought and sold--or go near belly up and get scooped up, as is likely to happen to any number of mortgage lenders over the next 12-18 months as they go subprime bust--I daresay a lot of data out there is still on paper.
Bank A buys Bank B, and they inherit, among other things, a file room with row after row of file cabinets with "stuff" in them. Assuming they find a loan app for a given loan, it might be a second or third generation copy of a carbonless 4 page loan app.
"Heh Ethel, does that look like a 5 or a 6 to you?"
"Looks more like an 8 to me."
"Yeah, probably right. OK, DOB month is August."
As for the dispute process, it's anyone's guess. Sometimes the CA, OC or CRA receives a dispute, cannot verify something which does not belong to the person disputing, and they do the right thing and delete. Other times, not so much.
With whom did your husband dispute?