That's quick for end of January batch, I am still waiting for the one that was originally start of January, than changed 10-20th December after I ordered it, Bitmain now says it will be despatched around 2nd January.
You are right about it being cheaper if it was on same waybill as UPS call it because they charge about £11 quid brokerage charge for each waybill. The problem is that they are shipped from different places, I assume Bitmain does not do any of their manufacturing but outsource it to other factories and stock ships straight from factories. If I remember correctly all of my PSUs shipped from one address/ company, 2 of L3+s each from different address, and D3 from yet another place. Interesting that even 2 L3+s from different batches were from different locations, they also have different fans and one only has intake grille while the other one has both. And the one I bought from e-bay has different fans to the other 2.