[Graham]

Yes I misread that, of course once delivered (which it hasn't as yet) then the tracking number becomes obsolete.

As we never received the DPD text message showing that the parcel was received by them, I don’t think the correct tracking number was ever activated by DPD who as such are still waiting for it from MIC to put onto their system.
 As to why MIC changed  the label when they collected the parcel from Kevan is still a mystery, I have asked them but they say it could be for a number of different reasons.