So I was doing some lessons and came across 増す. I remembered this and was pretty sure I had already learned it. Checking it afterwards, I saw it’s a level 25 vocab. I am level 28 now and recently had 0 lessons, I just unlocked some more items while progressing through current level. But this level 25 vocab is saying it was unlocked on the 19th. I checked the change logs for the site and didn’t see any mention of this vocab item so I don’t think it has been changed or reactivated etc.
Also my recent unlocks show the 13th as the most recent but I know I’ve unlocked more kanji and vocab for the current level within the last week. This could be due to the caching mentioned in other threads.
Any ideas why I got a vocab item in my lessons which I had already learned a few levels back?