I can say that the admissions office will not mail the LL without ALL of the pieces being in the file...all LORs, scores, transcripts etc. When our student was applying (LL) the LORs wwent snail mail, while the rest was transmitted digitally through Common App.
Coach had to call hs advisor and request a fax of the LORs because it was holding up the LL 2 weeks!!
FWIW I asked K1 about the current recruits, and K1 said that the team is under the impression that the LLs have been committed to all except 1 or 2