Miers Questionnaire

The SCOTUSblog is noting a strange occurrence:

When the deadline came and went for Harriet Miers to submit her revised answers to Senators' questions yesterday, many took it as a reliable sign that her nomination was to be withdrawn. They were right about the outcome, but apparently not about cause and effect -- at the very same time that Ms. Miers was asking the President to withdraw her nomination, she was submitting her revised questionnaire to the Judiciary Committee.  The cover letters to Senators Specter and Leahy are dated yesterday; and I'm hearing that the answers were delivered to the Judiciary Committee "very late last night."

A case of completing the historical record? Hedging her bets? Some other explanation?