The same details sit in three lists because each list started at a different step in your business, and none of them knows about the others. A one-week tally shows you which transfers you repeat. Then you enter each detail once, where it first arrives, and every other step reads it from there.
Read the full article: https://impruvement.com/blog/typing-data-twice-why-the-same-details-sit-in-three-lists