So yesterday I reached 28% fluency in German, and then today I opened up Duolingo to find that my German fluency had dropped to 21%, and also that the one memory bar each from seven topics had faded! I strengthened one lesson, then my fluency went up to 22%, but after strengthening another, I found that my fluency had gone down to 21% again! I also scrolled down my tree and saw that still I had a lot of topics to strengthen. Do fading memory bars have anything to do with my German fluency constantly changing, or is this a technical problem? Thank you!
I will try again, but it shows that those two lessons have been completed, and, god-knows, I have done both of them at least five times and done the practice lessons on them as well. It just seems to be stuck. I may shoot myself if I have to answer another question about a turtle or a strawberry.