I don't put much stock on the USC / Dornsife poll myself. I can't identify why it's hinky, other than observing some large day to day moves, like in the African American subgroup. It is also missing the DEM/GOP/Independent breakout.
I do agree that Sabato and Rove are beyond pathetic. I don't put any credence into anything either one of them has to say. They might be right, but whatever they say is driven first by their agenda, not by the facts.