I keep on waking up to so many reviews

I use [Userscript] WaniKani Lesson Filter to spread out my lessons, which then spreads out my reviews reasonably well (though sometimes they still bunch together based on when I do reviews each day).

Also, it looks like you have nearly 200 apprentice items, which is somewhat high. Did you just do a whole bunch of lessons in the last few days, or is it always that high?