User blog comment:CureHibiki/Pretty Cure Plus and Minus Round 3: Mystical Rainbow!/@comment-34140693-20191208151531/@comment-31801806-20191208151957

Yes. After you voted, you have to wait a full 24 hours before you can vote again. If for any reason you accidentally voted too early, then the vote won't be registered until the amount of time needed to pass until it reached a full 24 hours is reached. So say you accidentally voted 3 hours too early, then your vote won't be counted until 3 hours later.

This continues for every day that particular round lasts for and would reset back to 0 every time a round ends, so you start with a "clean" state every time a new round starts.