The app informed me last night that my Spanish course has been "realigned" and my position adjusted accordingly. Haven't dug into that yet, but when I went for Legendary on the S3/U8 closing lesson, it threw all manner of stuff at me I'd never seen before.
I bailed out of it and switched to Japanese until I have time to go back through the old lessons to see what they've done.
(I'm on S3/U16 but ever since the switch to "path" I've been diligently Legendary-ing old lessons for review.)