Very Impressed With Treasury's Ability to Manage Debt

WorldNetDaily made this disturbing assertion that for 56 days now, the total public debt has remained unchanged, just below the legal spending limit -- in spite of the inevitable changes one would expect from buying and selling securities, spending, etc.  And when I go to the Treasury Department's Daily Statements and look back at Today's total public debt for many weeks back, sure enough.  On July 16, 2013:

Total Public Debt
Subject to Limit       $ 16,699,396
Statutory Debt Limit $ 16,699,421 

On June 24, 2013:

Total Public Debt
Subject to Limit        $ 16,699,396
Statutory Debt Limit $ 16,699,421 

I am so impressed with Treasury's ability to hold the total debt exactly at that level.  Even on May 31:

Total Public Debt
Subject to Limit        $ 16,699,396
Statutory Debt Limit $ 16,699,421 

 Wow!  The total public debt hasn't changed (up or down) by even a million dollars over the last few months!

UPDATE: A reader points out that Total Public Debt Subject to Limit may not be the same as total outstanding debt.