The bot should always vote on the newest post. But it happens it jumps to an older one where there are some Steemit nodes problem.

When you got to our Discord there is a Qurator-assistant channel. You can type command !profile fiftysixnorth to check your last vote time and Qustodian votebank balance, or !refresh fiftysixnorth! to refresh the info or call the bot if your are past the 24h timeout.