So i’m literally about to do my last kanji that will level me to 15 but i decided to clear the lessons with vocab i still had to do first to make it a cleaner transition (idk). But every time i clear all the lessons, it acts as if i never finished them and keeps showing them as lessons i have to do.
anyone got any ideas? 
I’ve got the same issue it started just today.
Yes, it is a known issue at the moment. They should become aware of it (if they aren’t already) very soon and fix it ASAP. I would hold off on new lessons for now. Reviews still work though
It should be ok now. Is it working for you? If not, can you try clearing your browser cache?