Russian tree problem
I just finished the family 1 skill in the Russian tree and as it was loading the next set of skills it said that I was already level 1 in the skill people two even though I had never started or finished it.
It is a bug in the Russian course (and in many other courses).
Only Duolingo's staff is able to fix this.
You might submit a bug report via https://support.duolingo.com/hc/en-us/articles/204728264-How-do-I-report-a-bug-