It sounds like your forks are rebounding too quickly. Assuming that your forks are in good operating order, I would recommend adding rebound dampening. Try turning your rebound clickers in several clicks and see if that helps. Older forks can suffer from wear of internal components and create a quick rebound condition. In extreme cases, when landing from a jump, the wheel will actually bounce off the ground when rebounding from full compress. To this end, this is why I mention the condition of your forks. But with everything OK, I'd leave the positioning of your forks within the triple clamps alone and try adding rebound dampening. Good luck.