PR2 Front tire wear

I put a set of PR2 tires on in the spring and have about 2500 miles on them .The front has a line just off center which looks like a seperation of the dual compound , it is not straight but very ragged also the tire has an odd wear pattern . Took it back to the dealer purchased at and they were no help at all just normal was the comment . I do not want problems with the front tire ,does anyone have any suggestions .

When I was running those tires that was the normal look after some miles, never had any problems with the line in the front or rear tire.

Normal on the last 2 sets of PR2's I've had.