I ran into this offset question myself as I am trying to mount the bed. I have the 2 that are offset and put them under the cross sill closest to the rear as described, but see no reason. if the offset supposed to be front to back? Side to side? is so which direction? The bed also seems to be high centered on the middle blocks as there is either a gap in the back mount if I snug the front bolts down or gap in the from when I snug the rear down. Anyone else have this problem. Its probably a 1/4 inch gap. I measured the blocks and they are all 2 1/4 inch tall.
