Let’s cut straight to the chase: the reviews system has always been broken. It spammed items all the time, so much so that some people saw the same item almost every day.
Well, no more! The whole SRS system has been overhauled and review due-dates have been re-calculated. That’s why you may have noticed your review numbers change the other night.
If you experience any more issues please be sure to let me know! I’ll be keeping a close eye on it for the next few weeks to make sure everything’s working as expected.