Is this petty of me

My yard as I have mentioned has become very strict. And now I see different deductions have always been applied based on the overall weight of your load - for fridges (due to insulation ) dishwasher (due to plastic body) Metal doors with foam inside , VCR's , Other stuff ...
Now I don't mind the deductions as thats fare BUT I see that the weight reduction has been actually unfair, but for a wile I was not catching on
say i bring them a dishwasher that weighs 50 pounds well they took off 45 - A 40 pound door took off 40 . Now I see that since i have been including these items with my normal load I was actually getting ZERO pay . I questioned the situation and was told you need to weigh those items separate if you don't want a yard man reduction . I said your on the spot reductions caused those items to be ZERO . His answer: weigh separate . Well I know when not to continue the debate as I will not win. Any way what a pain , like what do I have to do now weight one 50 pound washer to get my official .5 or .6 per LB
The reason I see it has all along been sneaky is if i bring in a small load comprising of these items then i see no deductions are made as clearly they do want the stuff but there is no juicy weight to hide the deductions.
Am I wrong to think they should make honest on the spot reductions even I have gotten to a point i can pick up a item and know the weight by feel The yards must know the weight of all items backwards and forwards
You may ask how come I finally discovered this, It's because now it's a computerized bill (in you face with the real number) in the past there scratch sheet would say a reduction but you never saw it on bill with the exception for moisture reductions .
The game never ends by me !!