I would not expect more than a 1 day delay in customs... guessing something unusual happened like the customs documentation envelope falling off the box.

That or they have a drug sniffing dog with a quirky sense of humour.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8