If I am understanding you, you have made the left and right steering links unequal lengths? The left and right steering links should be equal. If the ackerman plate is not centered when the servo is centered, use the sub-trim to center it and the on the fly trim to make the truck drive straight. In an extreme case, I have had to alter the length of the small drag link to center the ackerman plate. But the links from the ackerman plate to the hubs should always be equal, if not the steering will be funky