In the toolbar, only the Suggested Edits queue quantity is shown. (I assume this because clicking on this number takes me directly to Suggested Edits every time.)
Why does this number only represent Suggested Edits and not all of the different review queues? Obviously, the close queue is always ridiculous (though that is getting better), so perhaps that one is worth excluding. But why are the rest not considered in this number?
If there is a disparity in mixing the different queue's totals, why show a number at all? Why not change it to some sort of icon notification if there are any review tasks available to be completed?