I believe the CX1 is made to fit road frames with a 68mm bottom bracket, so it does not use any spacers with a GXP bottom bracket. The instructions with the bottom bracket are for installing an MTB crankset, which has a longer spindle and needs the two spacers if it is installed in a 68mm bottom bracket. To be clear, road spec cranksets don't use any spacers with a GXP bottom bracket.