Here is the tracking graph for the Democratic Gubernatorial Primary race. In the last 3 months Lt. Governor Bev Perdue's numbers have been very consistent, but Richard Moore's have been somewhat volatile. It's most important to remember that a plurality in all these polls are undecided, so there is a lot of room for movement.
This graph is a combination of all polls on this race including PPP and Civitas polls.
Using just PPP data the race looks a bit more fluid.