Omega Turbocharger Question

 My left greaseport pulsates up and down when the compressor is pumping and the right one doesn't. I have a video clip but can't figure out how to load it. The left needed to be refilled before the right one. Is there any issue with this? It has 13 hours on it and has been working like a champ. I have turned the knobs every 6 hours as described in the directions. When I refilled I checked it and everything seems to be the same as the right one. Any thoughts?

I previously had a Supercharger and liked it but it was very slow. I gave it away when it had 260 hours on it.