There is another way..
Login to OASIS on the ECFMG website. Go to ERAS Token >> Residency token..
There you can see what packets ECFMG has received for you. Mind you, as of today, there is a lag of 5 working days between ECFMG receiving the packet and this information appearing on OASIS.
In another five days after they would admit to the fact they have got your packet, they will come around to scanning and uploading it. Of course, once it's uploaded, you can see it in ADTS in myERAS.
So, in all, 10 working days (two weeks) between ECFMG receiving the packet and them uploading it. Sucks big time, but that's what's happening..
(If waiting five days gives you jitters, I would suggest sending it via some kind of mail that gives receipt confirmation.)
Oh wait, I just re-read the question and this is not what you asked..
Well, maybe someone will benefit from this info.. As for your question, ERAS names the LORs LOR1, LOR2 etc according to the order you put the names of recommenders in the Documents section. Once you have identified the ERAS names for your individual LOR writers, you can go to ADTS (Track my applications) and see which ones have been uploaded.