Having problems building the shocks. I have always sucked at this. In regards to the emulsion caps with the bleeding screws. I followed the directions on a Youtube video, but the shocks never come out right for me. I'll compress the shaft all the way up, some oil comes out, then put the bleed screw into the cap. I pull the shaft all the way down, then it gets sucked back up on it's own. What causes this? I followed the bleed instructions exactly, but it doesn't work for me. What am I doing wrong?