What causes the paver pass have rich shiny strips on each side and a dull, torn look in the middle?

The paver screed does not have enough lead crown in it. Note: Paver screeds should have slightly more crown in the leading edge than in the trailing edge – usually about 1/8 inch. This may very with equipment manufacturer and/or width of paver pass. Even if the trailing edge of the screed is to place a flat or straight grade, the leading edge must still have the increased crown.