Certain items are weighed correctly, however many are not. For instance, I weighed two items on a working scale and it said item A was 1.7 pounds, item B was 0.3 pounds. I put A on the scale in question, and it read in the OPOS as 1.7 pounds, however in RMS it read as 7.8 pounds. Item B read correctly in the OPOS software as well but in RMS it was around 5 pounds. But when I put both items on the scale, it read correctly in the OPOS and RMS as 2.0 pounds.
Any ideas as to what could be causing this?