Way too many lessons up for review
For the next week or so, I've been flooded with about 6 lessons for review every day - a much higher volume than the usual 2-3. This is not the same problem reported elsewhere (a bug where Possessives 2 is always up for review), although many of the lessons seem to need reviewing way too often (every 2-3 days, for lessons I've originally completed months ago).
As reported before, this is really frustrating as I'm 3 units away from finishing my tree but just can't find enough time to fight through the reviews and move forward.
Is this a known bug? New content being added? Does anyone know what's going on?
P.S.: this is not the "new tree" that was introduced a few weeks ago. I've completed (and ranted about!) that already.