A little trick for FedEx shipments ... you can use:
fedex.com=>Track=>TrackByReference
There, skip the Acct# field, and put your DirecTV order # in the Reference field, fill in Country & Zip, then "Track"
The only gotcha I've had is sometime the vendor/shipper will add extra characters to the order # on the label (like -1 [even when there's no -2]). I don't know if DirecTV does this.