Bug reporting?

I just hit level 30 and I think I am seeing a bug. None of the new items of level 30 have been taken out of the lessons queue yet (I just hit the new level). Yet is shows that one of the radicals “waiter” is something I mastered. It claims i have hit a streak of 6 out of 6 (with an unlock date of today). Where can I report this? Just here?

Oh and now I am going to do my review and first item in my queue is “waiter”…

‘Waiter’ used to be on an earlier level, so you unlocked it a while back.

Ah! That makes sense. I was wondering why I seemed to know, sub-consciously that it was waiter:-)