My levels were reset!
Using MacBook Pro and Safari. I was at German level 10 and French lev el 8 until three days ago. When I accessed Duolingo that day both were reset to level 2 with no apparent way back to my progress level - help! Mark Hill
I'd guess that you got the crowns update like many others, too. Have a look at the discussions, there are some stickies and other high-voted contributions about it. Tell me if I'm wrong ;-).
btw, I can still see your levels in German, French and Italian here, also your points on your personal page.
The levels (10, 8 and 7 for you) are not related to any access restrictions, they're based on how many XP you gained so far, not how many skills you unlocked. Unlocked skills have a skill level 1,2,3,4 or 5 (gold) now. Before, they were just colored or golden, and had a strenght indicator, that is abandoned now (was also 1 to 5, by chance). Locked skills are still grey, like before.