Not at all. The answer's kinda hidden in this paragraph:
The final breakdown: a signing bonus of $11.5 million. Base salaries of $6 million in 2007 (up from the $1.5 million Romo was to have earned this season under his existing contract), $6.5 million for 2008, $7 million for 2009, $8.5 million for 2010, $9 million for 2011, $9 million for 2012 and $11.5 million in 2013. The full base salaries in 2007 and 2008 are guaranteed, as is $6 million of the 2009 base salary.
11.5 + 6 + 6.5 + 6 = $30M guaranteed, paid out over 4 years. I heard 30.5, but who's quibbling about a few hundred thousand?
8.5 + 9 + 9 +11.5 = $38M for 2010-2013, plus another 1 million for the unguaranteed portion of 2009, minus the 1.5 million he was already scheduled to make this year = $37.5M unguaranteed. A total of 67.5M.