It looks like a batch is flagged red as having been adjudicated if the operator touched at least 1 ballot in the batch. But if you were to scan a batch of 50 it wouldn't tell you which votes were changed, how they were changed, or how many in the batch were changed. Now imagine in every batch of 50 there is likely at least 1 that honestly needs adjudication (smudges etc), and every batch is flagged red. All record of vote changes is lost. This looks designed to avoid any paper trail of the operator changing votes.