A lot of times the person making he final decision isn't even the person rating and we don't even know it. Final decision makers often delegate sifting through entries and rating so they can look at a pre-selected shortlist. I don't imagine this happens the majority of the time but I've seen enough evidence of it to know it's happening. You can't always guarantee your entry is being seen by the "right" person, but, atleast when SH is involved they're batting for both teams!
Just a thought...what if SH compiled periodic lists throughout the contest and/or one final list for the CH to consider or just put a special symbol by entries of interest VS assigning ratings that may cause an entry to be looked over.