Ah - so if it arrived at the hub later than the other items it would have been included in that drop? I guess it's a one way search at the time the package is scanned in that determines which way it goes. Logically that would make sense otherwise Surepost packages would have to be held in abeyance and that would be messyCould be your other package(s) weren't known, therefore, system only thought you were getting the one package.
'Curiouser and curiouser!' cried Alice
Jam is heavier than bread.
I guess there had to be a physicist in this group