The problem is that those letters were not sent in September 2003, October 2004 and March 2007. By Countrywide's own admission, they were "recreated" and placed in the homeowners file in April. The first letter actually had the wrong address for the lawyer, who had not yet moved into the office listed. Here's how the times presents Countrywide's explanation of the "recreated" letters
Under questioning by the judge, Ms. Puida [a lawyer for countrywide] said that “a processor” at Countrywide had generated the letters to show how the escrow discrepancies arose. “They were not offered to prove that they had been sent,” Ms. Puida said. But she also said, under questioning from the court, that the letters did not carry a disclaimer indicating that they were not actual correspondence or that they had never been sent.Countrywide's lawyer could not explain why the faked letters were sent to the homeowners lawyer, if it wasn't as evidence that real letters has been sent earlier.
More information and background is available at Majikthise and the cites she links to.