The sound 4 guys in cursed stage 2 are jounin lvl. They beat genma and the other guy (for got his name) because they where weekened from comeing back from amission. But in fighting the two elite jounin the sound 4 became weak as well so in turn giving the konoha genin (which are more powerful then usual genin I:E byakkugan/most talented hyugga ever, kyubbi power, steroids pills & one of the smartest characters in the naruto universe) a better chance at victory. Note i didnt mention kiba because he would have been finished if it wasn't for konkaru. Shika would have lost also but he still did his shit in out smarting that chick.