Could be technique, could be sharpness, or a combination of the two. IME if it is sharpness, or the lack of it, you wouldn't get a smooth shave on the neck even if you did alright on the cheeks. If the razors were pro honed to start with how long have you been using them since they were honed ? Might need a touch up or you might need to work on the coup de maitre. Mustache, knob of the chin and the hollows around my windpipe are the toughest spots for me.