Edelbrock mid throttle problem

Engine was tested before it was installed into car. All the recommended additivies was used and I have always used kendall 10w 60 oil with zinc additive, so this should not be the problem. Also after the engine was started the first time, we kept rpm around 2500pm for 20 minutes.
Also the lubricant from compcams was used during the installation like the instruction recommended

Problem is somehow related to camshafts lobe, because there was pale grey area in every lifter, shape of the area was almost circle but offcentered.

Haven´t got reply from Compcams yet