I'm not puzzled, that makes perfect sense to me. More Floridians go see Newt because he is more fun to listen to. That's what I'd do too, listen to Newt and vote for Mitt (probably).
If we elect Mitt, who the polls tell us has a better chance of defeating Obama, we will spend the next four years listening to boring speeches. The important thing is defeating Obama and it doesn't seem that Newt can do the job.