Whenever I get the "there are no more items to review in this queue" (or "you've performed your limit for this queue") and click on Review at the top left to go back to the main Review page, I seem to need to click it again to actually see updated results.
That is, it most often still displays non-zero numbers for the queue I've just cleared (and if I do click on them again they immediately show "no more items"), but they're zeroed on a refresh.
I'm guessing this is actually some sort of caching bug.