I am just now getting some of my October mail. I never expected an Express package with a tracking number could get lost.
I DO have a letter from Consumer Affairs confirming the fact that this has happened.
I had something shipped from California a couple of years ago. After a couple of weeks I looked up the tracking information and discovered it had been returned to the vendor for an invalid delivery address, even though the delivery address was correct. They claimed they could not verify it had been returned and I told them to go look at the link THEY gave me to track it. I contacted them for months about returning my money but they could never verfiy it had been returned to them. I asked them to at least re-ship it and they said I'd have to pay for it again. I don't do business with them now, needless to say. The point is, tracking numbers just help verify that something is really lost, or so it seems. Hang in there!