Yeah, the Kerry/Weld results you cited make absolutely no sense at all. Presumably some people just didn't understand the question, or deliberately were trying to screw with the pollsters. There's no other explanation for saying you want Kerry to lose, yet having voted for him.
With regards to Wellstone, the 21 percent voting for him is believeable. Although he may have been too liberal for some voters, he still could well be the lesser of the two evils and thus still gotten their votes.
Arguably, there is. You could want Kerry to lose, but want Bush to lose more, and swallow your pride.
