B.B. writes:

Moral of the story: Southeastern Freight sucks. Avoid them if you
can.

Call MSC customer service and get your account flagged for "real UPS
shipping only", otherwise they put your stuff on a iffy consolidator
service to save a few bucks.

I too learned this the hard way. At one point my packages were being
delivered by an (apparently) illegal non-English-speaking immigrant driving
an unmarked, beat-up old Honda.

It took me a while to figure out why I wasn't getting UPS tracking numbers
(that worked) on my invoices.