The way I read this- They are only need to comply with 611(a)(1) if the investigation found inaccurate reporting.
See the BOLDED IF and AND
You can only really sue for "Willful non-compliance"
§ 623. Responsibilities of furnishers of information to consumer reporting agencies[15 U.S.C. § 1681s-2]
(8) Ability of Consumer to Dispute Information Directly with Furnisher
(E) Duty of person after receiving notice of dispute.
(iii)complete such person's investigation of the dispute and report the results of the investigation to the consumer before the expiration of the period under section 611(a)(1) within which a consumer reporting agency would be required to complete its action if the consumer had elected to dispute the information under that section; and
(iv)if the investigation finds that the information reported was inaccurate,promptly notify each consumer reporting agency to which the personfurnished the inaccurate information of that determination and provideto the agency any correction to that information that is necessary tonmake the information provided by the person accurate.
