I installed a set of Hotchkis springs on my xB last weekend and the front is slightly bit higher than the rear. Should I expect more settling?

FYI, contrary to popular belief, springs don't settle. The average drop for the Hotchkis, Sport Springs are as follows: 1.4" Front / 1.6" Rear. The correct way to verify the drop would be to measure from the center of the wheel to the fender edge (front & rear) with the vehicle setting on a level surface before you install the springs and the again after the drop. When comparing the numbers, the difference should be close to the average listed above.