One thing from the crosstabs doesn't jive: Diaz-Balart is leading Martinez by 48-44 among men, but apparently Martinez has a 49-43 lead among women. It makes no sense at all for Diaz-Balart to have a five point lead with a breakdown like that, so I think it's reasonable to conclude that Telemundo51 must have accidentally flipped the female numbers between the two candidates.
The ethnic split also pretty much tells the story: Cuban-Americans favor Diaz-Balart by 61-30 while non-Cuban Hispanics give Martinez a 53-37 edge. Whites and African-Americans favor Martinez by 47-39.