Some bags have only 2 bundles when the minimum is 4 or 6. Why?
Small bags require at least EITHER 4 bundles OR 3.5 Kg. Large bags require at least EITHER 6 bundles or 7 Kg. So if the mail piece is heavy (say 220 gms), then a smaller number of pieces than 4 (or 6) bundles will suffice to make a bag. In this example, 16 pieces, comprised of 2 bundles (or even 1 bundle) would be correctly placed in their own bag (3520 gms, small bags). This is not an option or a feature, but is a CPC requirement. It is especially noticeable on low density small mailings with a heavy mailing piece.