Why is is disingenuous? In almost all of the polls listed below the total % for McClintock added to the column of the person in 2nd place, produces a win.
http://www.realclearpolitics.com/Congressional/California_Recall3.html
Poll Schwarzenegger Bustamante McClintock Ueberroth Huffington
RCP Average 30.0% 27.3% 9.3% 5.7% 3.0%
Survey USA (8/23-25) 45% 29% 11% 6% 3%
LATimes (8/16-21) 22% 35% 12% 7% 3%
GL Res. (8/13-18)* 31% 25% 17% 8% 3%
PPIC (8/8-17) 23% 18% 5% 4% 3%
Field Poll (8/10-13) 22% 25% 9% 5% 4%
Gallup (8/7-10) 42% 22% 13% 7% 7%
Time/CNN (8/8) 25% 15% 9% 4% 4%
In all but one of the polls you listed where McClintock plus 2nd place would win, Ueberroth plus 2nd place would also win. It appears that Ueberroth is nearly as significant a spoiler as McClintock, if the given polls were actual election results.
(The one exception is the PPIC poll, where McClintock and Ueberroth are only 1% apart anyway.)