Treasury Math: #Winning (SEE CHART)

We have a quick question for the Treasury Secretary: according to today's DTS, as of close yesterday, the Treasury had $14.274 trillion in debt subject to the ceiling of $14.294 trillion, or a $20 billion "buffer." To the best of our knowledge there were no redemptions today, and certainly none in the non-Bill pipeline this week. So, uh, how exactly did Tim Geithner auction off $32 billion today? (and plans to auction off another $40 billion tomorrow and Thursday)