As you've pointed out, the phrase "the berry will ... not be restored again" probably should have been "the berry will ... not be restored again in the same round", to avoid a potential misunderstanding. It's probably referring to the case when, after the Berry is restored with Harvest, the "conditions for berry use are met" immediately afterward.
Harvest has an effect that triggers once at the end of each round if certain conditions are met; it doesn't matter whether Harvest triggered for its bearer previously:
"At the end of each round
, if Sunny Day is in effect or else at a 50% chance, and if bearer isn't holding an item and the last item consumed by the bearer is a Berry, the bearer receives the last item consumed by the bearer and that item is reset."