Indeed. This is again a problem of English, not Klingon.
The gloss for {leS} says "days from now", but if it were more precise,
it should have been "1 day from now, (plural) days from now", or maybe
"day(s) from now" - and that would have looked really awkward.
(especially for "one day from now", people would ask "why didn't he just
write tomorrow?")