dyskinesia

started having issues right after install. initially was just with a scene change. AGC would kick in and I'd get 1 or 2 lines vertically in same location. Now present pretty much day/night have a replacement but bench testing shows similar pattern. not as bad but still present. should I just ignore it? being too critical? my other cams bullets and Domes do not have this issue. so I'm guessing I got a couple of bad cams? they look more pronounced than the posted pics show. not being whiny I think they lose some impact when down-sampled for web posting