Three weeks after checks sent to homeowners as compensation for foreclosure abuses were rejected for insufficient funds, the consulting firm at the center of the mishap erred again: a fresh round of checks was written for the wrong amounts, the New York Times DealBook blog reported today. In recent days, Rust Consulting issued nearly 100,000 checks for less than the homeowners were owed. The mistake potentially cheated consumers out of millions of dollars they were owed under a deal reached between the government and the nation’s biggest banks. Federal regulators ordered Rust to fix its mistake, and Rust said yesterday that it had “corrected the error and plans to mail supplemental checks to affected borrowers as soon as May 17.” It attributed the mistake to a “clerical error.”