Theese two aren't zoomed in, but you can see the last month clearly.
Note how the lines are the averages, but it shows outliers. Generally for all 3 polls, ROmney's outliers are low, and Obama's are high (with a couple noticeable exceptions.)
Remember that margins are thin and the number of persuadable voters is relatively small. A percent or two is a huge movement in a state like Florida.
Bain + the Supreme Court ruling on ACA equaled a distinct separation between the two over the last month in these key states. Quite obviously if Obama takes Ohio and Florida, the electoral rout is on.