"The first item was 'delayed' then 'resolved' then 'delayed' again and has sat there for about 5 days now"

"What are these alleged 'delays"

It may or may not be true,  but  a response two days ago regarding  a parcel that was delivered to the Litchfield  hub

on 20th April  and has  been sitting  there  for 8  days was:

" The delay  is due to the Easter Bank holidays in the UK.  The staff  in the hub are  catching up with the volume"