The factory recommended tire pressures might be suspect here. I'd contact the tire manufacturer direct for an update. Why you ask? Because on a different brand bike the factory pressures were way below the tire maker's recommendations...I mean like on the order of 5 to 10 lbs lower and that's huge when it comes to tire wear and wobble.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)