The goof occurred at the production center that distributes DVDs to voters. The episode entered by Greenfield for Best Supporting Comedy Actor ("Control") was accidently submitted as the entry of his costar Zooey Deschanel in the Best Actress race. Her episode, "Bad in Bed," was sent to judges of Best Supporting Comedy Actor as if it was Greenfield's submission.
Since ballots had already been returned by voters and there were only two weeks to go before Emmy night, the TV academy decided to address the matter in a simplified manner. The judges of both categories were sent the correct DVDs of "Control" and "Bad in Bed" with an explanation of the mixup. They were told to view the episodes and, if they wish to change their votes, they were to fill out a new ballot. If they didn't bother to do that, their first ballot would apply.
However, there was a key stipulation. Either way, all voters had to sign an affidavit attesting that they viewed the new episodes and then return it to accountants at Ernst & Young with instructions about their preference to stick with the first ballot or to enter a new, revised one. If voters did not bother to return the signed affidavit, their first ballot would be disqualified.
Will Deschanel and Greenfield benefit from getting special attention during the re-voting?