What doesn't surprise me is that we are getting a tossup poll from Florida at this point in the race, what does surprise me is that there is almost 20% undecided in a state that Bernie did not perform particularly well in, and Trump dominated everywhere but Dade county.
It sounds like the famous Florida independents are so far not especially enthused with their major party choices, and PPP didn't push respondents since it is still early in the GE season and pollsters won't start working towards LV models and pushing undeciders until after the conventions.
The undecideds are the Never Trump Hispanics, other Never Trump and some Bernie supporters. We have to wait some more to know for sure where Florida goes.