I was doing a new Dutch lesson on Duolingo (from the website) and when I finished it something strange happened: lots of other skills, that should be usually unlocked when all the above skills are at least at level one, were unlocked. This would not have been a problem for me if all these skills were set on level 0, but one of them was set to level 4 and another one had the first lesson completed. The skill I did is "body", the level 4 skill is "Calendar" and the other skill is "health" (that keeps increasing the done lessons when I go on with the "body" ones).
What happened? Have you ever had a similar problem with the app or the website?