Yeah, this is the main problem with going fast. I did as well on my first round and I did also go through all lessons in a single day, mostly, but it’s a method that demands you don’t have failing accuracy as you go. And even with good accuracy (which your accuracy certainly is! good job on that!), there are bound to be, as you way vocab with those strange readings, that just makes them wanna fall down the SRS-levels.
You’ll have to figure out for yourself how many leeches are too many to handle, but count on them also adding to the apprentice and guru count, which means more reviews/day.
If you want tips on how to handle leeches, you might wanna take a look at my study log. ^^ *ekg's leech battle blog - a study log of sorts it was mostly dedicated to handling leeches as I saw them as the main thing that took time and effort during reviewing (not the current SRS-items).