twisted keel wings
I am not specifically familiar with the keels on the Hunter 310 but in general wing keels are designed to minimize their drag and to direct water aft along the keel bottom to improve the efficiency of the shorter foil length. If one side is canted up or worse yet, one side is down and the other up, drag could be increased dramatically.
Beyond that, 1.5" is a lot of offset. (1/4" inch is a lot) It may actually refelct a more serious problem such as a missing keel bolt on the wing. The boat should be under warrentee and it should be checked.