[rc10fan]

hi i thought the same thing. it only happens on the rears. i build mine like this.

1. fill shock with oil to the top
2. move the piston up and down slow
3. once all the air bubbles have gone slowly slide the shaft so you have about 5 mm shaft showing (make sure the shocks are fully built.
6. leave the bleed screw fully tightened in place then screw cap in place
7. fit spring etc
8. pump the shock to build up the pressure

job done

as mentioned above once built the shocks work fine