One, there is no way Rubio is ahead in FL if he is down nationally by 14. FL didnt go from R+1 to R+9 or more. There is a home state advantage, but it isnt that great.
Also with Hillary polling at 56%, that is at Eisenhower landslide and closing in on Reagan landslide. Does anyone get the sense that is happening? That much support for Hillary? If she was doing that well, there wouldnt be angst among Dem party officials and liberals about her nomination.
Easily explainable. This poll is among adults, so Hillary's margins are overblown. On the other side of the fence, Mason Dixon is a junk pollster that has an enormous Republican bias (they said Romney would win FL by 6 points.) When you correct for both of these factors and also consider the home state bonus, the results more or less line up.
Also, there is no angst among Democrats about Hillary's nomination. It's a media narrative with no basis in reality. Just look at the polls for proof of that.