As if we'd expect anything different from Fox?
Fox hires two firms (one D and one R) to do the polling. In fact, the two firms they use also do polling for other networks.
I mean, their idea of "balance" is Hannity and Colmes. For all we know the Democratic side is led by Dick Morris.
Regardless, it's pretty obvious the race has narrowed significantly. And the polls are going to go up and down multiple times over the next 6 months, just like they do in every campaign. Hopefully this teaches the "Hillary is a lock!" people a lesson, though they'll probably just transition to thinking Trump is a lock instead.