"Pick One" - how is that not clear?

From CNN, regarding the Coleman-Franken recount:

Yet if the trend of the latest voting count continues as it has — Coleman initially led by 725 votes, but his lead has dwindled to just over 200 — Franken may be in the more favorable position. A recently completed Dartmouth study of the race argued that the roughly 34,000 residual votes — defined as undervotes, where a ballot has not been fully filled out, or overvotes, where more choices than are allowed were checked off — cast in the race could decide the election for Franken because those votes have historically been cast primarily by left-leaning voters. "With the voter who tends to pull the lever for Democrats, there's a little less dexterity," says Larry Jacobs, the director of the University of Minnesota's Center for the Study of Politics and Governance, who is familiar with the study.

It's scary to think that the folks selecting our nation's leaders can't grasp the concept of "pick one".