In this use case:
Five days ago, someone hit the daily rep cap (with a great overhead, say 50 upvotes for answers, that would have been like 500 rep). and his first 20 upvotes will be added, the last 30 upvotes will be give up.
Today, a voter who vote up his answer 5 days ago canceled his vote. and the vote in the first 20 upvotes, so the wretch lose 10 rep.
What will happen then? Will Stack Overflow recompute the rep of the day, and add 1 upvote from the given up upvotes?
And if the voter changed the upvote to downvote, the lost -12 rep belongs 5 days ago or today?