Looking at the graph it’s obvious (to my eye, at least) that the last 3 days are a result of the “adjustment.” It doesn’t look like typical movement in a rolling daily poll. Also, the shaded area is significantly narrower all the way back to the beginning.
I’m sure the pressure to modify their methodology was tremendous; Trump was likely going to touch 50% and HRC was likely headed for 39%.
In 4 more days the “reset” will be complete and we will see what the new normal is for this poll.
It’s interesting that statepolls.com using last D/R samples M/F samples has Trump surging virtually everywhere, and it also has USC back at 5.7%.